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Amorphous FeNiCoCuSiBCr Alloys with Superior Direct Current Tolerant Characteristics
JOURNALOFIRON ANDSTEELRESEARCH,INTERNATIONAL２ ０ １ ５,２ ２( ２):１ ４ ５ Ｇ １ ４ ９
Amo r sFeNi CoCuS i BCrAl l o swi t hSupe r i o rDi r e c tCu r r e n t phou y To l e r an tCha r a c t e r i s t i c s Xi ao Ｇ r ong WU１ ２ , De Ｇ r enLI１ ２ , ZhunLI１ ２ , Zh i Ｇ chaoLU１ ２ ,
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( １．Ch i naI r onandS t e e lRe s e a r chI ns t i t u t eGr oup,Be i i ng１０００８１,Ch i na; ２．Advanc edTe chno l ogyand j Ma t e r i a l sCo ,Lt d ,Be i i ng１０００８１,Ch i na) j Ab s t r a c t:Amo r １９CoxCu０１S i r１１ ( x＝０,１,５,１０)r i bbonswe r eanne a l edunde rmagne t i cf i e l d phousFe６２－x Ni ３ ８B １４C andt ens i l es t r e s s,r e spe c t i ve l he i rmagne t i cp r ope r t i e swe r ei nve s t i t ed．Fe７３５Cu１Nb３S i ndFe６６Ni Ｇ y,andt ga １５ ５B ７a １０ Cu１Nb３S i ano c r s t a l l i nea l l oyr i bbonswe r ea l s of ab r i c a t edf o rc ompa r i s on．Exc e l l en tDCt o l e r an tp r ope r t s y ywa １１B ９n ob t a i nedi nt heamo r CoCuS i BCrr i bbonsa f t e rt he rmomagne t i ct r e a tmen tandt hec ons t an tpe rme ab l e phous FeNi r ope r t simp r ovedwi t hi nc r e a s i ngCoc on t en t．Ther e l a t i vepe rme ab i l i t sc ons t an tupt ot heDCb i a sf i e l do f p ywa ywa －４ －４ －４ app r ox ima t e l heva l ue so fr e l a t i vepe rme ab i l i t r e１６５０,１２００,and y６×１０ ,９×１０ ,and１０×１０ Tandt yμr we １０００wi t ht heCoc on t en tbe i ng０,５a t ％ ,and１０a t ％ ,r e spe c t i ve l Be s i de s,s t r e s s Ｇ anne a l edFeNi CoCuS i BCra l Ｇ y． l oyr i bbonswe r ep r ovedt oexh i b i tpo s i t i ves a t u r a t i onmagne t o s t r i c t i onc ons t an tλs． Ke r d s:Fe Ｇba s edamo r l l oy;magne t i cp r ope r t i e l danne a l i ng;s t r e s sanne a l i ng;doma i ns t r uc t u r e phousa y;f ywo
Cu r r en t l hema t e r i a l sapp l i edi nt hec o r e sf o r y,t DCt o l e r an tcu r r en tt r ans f o rme r sma i n l nc l udeFe Ｇ yi ba s edamo r c r t a l l i nec ompo s i t ema Ｇ phousandnano ys t e r i a landCo Ｇ ba s edamo r l l oys．Fe Ｇ ba s eda l Ｇ phousa l oyshavel owe rp r i c e sbu tr educ edDCt o l e r an tpr op Ｇ e r t i e s,c ompa r ed wi t h Co Ｇ ba s edt a t t e ri s ype．Thel r e f e r r edduet ot heexc e l l en tDCt o l e r an tp r ope r t i e s p i nt heh i Ｇ endma rke t sde sp i t et heh i o s t． gh ghc Fe Ｇ b a s e dn a no c r s t a l l i n ea ndamo r ss o f tma Ｇ y phou g n e t i ca l l o s,e xh i b i t i ngu l t r a h i a t u r a t i on ma e t i z a Ｇ y ghs gn , , t i on h i t i cpe rme ab i l i t owc oe r c i vef o r c e gh magne yl andl owc o r el o s s,a r ea t t r a c t i ng mo r eand mo r ei n Ｇ [ ,] t e r e s t s１ ２ ．Theexc e l l en ts o f t magne t i cp r ope r t i e s a r ea t t r i bu t edt ot hef o rma t i ono fbc cα ＧFe( S i)nano Ｇ c r t a l l i ne g r a i ns d i spe r s edi nr e s i dua lamo r ys phous ma t r i x,andexchangei n t e r a c t i onsbe twe enad a c en t j α ＧFe( S i)n a nog r a i n sv i at h er e s i du a lamo r h o u s h a s p p e [ ] wh i chave r aget hemagne t o c r t a l l i nean i s o t r opy１Ｇ３ ． ys I ti swe l lknownt ha tadd i ngNiandCoi nnano Ｇ c r s t a l l i n ea l l o si n c r e a s e st h e m a n e t i ca n i s o t r o y y g py cons t an tKu．Al a r animp r ovet hes o f tmag Ｇ geKu c [ ,] ne t i cpr ope r t i e si nah i r r en tr eg i on４ ５ ．Mag Ｇ ghcu ne t i cpr ope r t i e schangeowi ngt ot heva r i a t i ono ft he
e f f e c t i vean i so t r opy wi t hNiadd i t i on６ ． Subs t i t u t i on o fCof o r Fei nF i neme t Ｇ t l l oyssub e c t ed t o ypea j [] t he rmomagne t i ct r e a tmen t７ andt he magn i t udeo f t hei nduc ed magne t i can i so t r opycons t an thavea l so [] be ens t ud i ed４ ． Howeve r,t hei n f l uenc eo fi n t r oduc t i ono fCo i n t ot heFeNiCuS i BCramo r l l oyont hemag Ｇ phousa ne t i cp r ope r t i e si nduc ed by t he rmomagne t i ct r e a t Ｇ men to rs t r e s sanne a l i ngha sno tbe eni nve s t i t ed． ga Mo r eove r,t hehys t e r e s i sl oopso fso f tmagne t i ca l Ｇ l oysc anbet a i l o r edbyun i ax i a lan i so t r op i e si nduc ed i nt hep r oc e s so fanne a l i ng wi t hanapp l i edmagne t i c [ ,] [ ] f i e l d８ ９ o runde rt ens i l es t r e s s１０Ｇ１３ ．Cons equen t l y, []
i no rde rt oimpr ovet hed i r e c tcur r en tt o l e r an tpr op Ｇ , ( , , e r t i e s Fe６２－xNi１９CoxCu０１S i３８B１４Cr１１ x ＝０ １ ５, １０)amo r l l oysunde rva r i oust r e a tmen tcon Ｇ phousa d i t i onswe r ei nve s t i t ed． ga
１ Exp e r imen t a lMe t hod
Me l t Ｇ spunFe６２－x Ni１９CoxCu０１S i３８B１４Cr１１ ( x＝ , , , ) ０ １ ５ １０ amo r i bbonso f６ mmi n wi d t h phousr andabou t２０ μmi nt h i ckne s swe r ewoundi n t ot o Ｇ r o i da lco r e s．Theco r es i z ewa sϕ２３ ２ mm ( ou t s i de
Founda t i onI t em: I t em Spons o r edbyNa t i ona lHi Ｇ t e chRe s e a r chandDeve l opmen tPr o r amo fCh i n a( ２０１２AA０３０３０１);Na t i ona lNa t ur a lSc i enc e gh g Founda t i ono fCh i na ( ５１０７１０５０) B i o r aphy: Xi ao Ｇ r ong WU,Ma s t e r; E Ｇma i l: wxr １０２１＠１２６ c om; Re c e i v e dDa t e:Oc t obe r２１,２０１３ g
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J ou r na lo fI r onandS t e e lRe s e a r ch,I n t e r na t i ona l Vo l ２２
d i ame t e r)×ϕ１７ ８ mm ( i ns i ded i ame t e r)×６mm． I n af i r s ts e r i e so fexpe r imen t s,c o r e s wound f r om Fe６２－xNi１９CoxCu０１S i３８B１４Cr１１ ( x ＝０,５,１０)a l l oy r i bbonswe r eanne a l eda t３９０ ℃f o r２０mi ni nN２a t Ｇ mosphe r eunde rat r ans ve r s emagne t i cf i e l do fabou t ３５ mTt oi nduc eaun i ax i a lan i s o t r opy,ba s edont he d i f f e r en t i a ls c ann i ngc a l o r ime t r DSC)r e su l t． I na y( s e conds e r i e so fexpe r imen t s,Fe６２－x Ni１９ CoxCu０１Ｇ S i３８B１４Cr１１ ( x ＝１,５)a l l oyr i bbonswe r eanne a l ed f１０５ MPa．Thes t r e s swa s unde rat ens i l es t r e s sσao app l i eda l ongt her i bbonax i st oa ch i evei nduc edan i Ｇ so t r opy by c on t i nuous l s s i ng t hr ough an open y pa f urna c e．Th er i bbon sa f t e rs t r e s s Ｇ a nn e a l i ngwe r ewound i n t ot o l o i da lc o r e ss imi l a r l Fe７３５Cu１Nb３S i１５５B７and y． Fe６６Ni１０Cu１Nb３S i１１B９ a l l oyr i bbonsandc o r e sunde r op t imum anne a l i ng c ond i t i ons we r ea l s of ab r i c a t ed f o rcompa r i s on． DSCcu r ve so ft her i bbons we r e me a su r edby DSC４０４Ca tahe a t i ngr a t eo f１０K/s．XＧ r ayd i f f r a c Ｇ t i on ( XRD)pa t t e rnso ft hes amp l e swe r eexami ned us i ngaBruke rD８ Advanc eXＧ r ayd i f f r a c t ome t e ra t r oomt empe r a t u r ea f t e ranne a l i ng．TheDCand AC magne t i cpr ope r t i e so ft hewoundc o r e swe r e me a s Ｇ ( ) ur edwi t haB ＧHt r a c e r MATS Ｇ ２０１０SD andaB ＧH ana l e r( IWATSU SYＧ ８２３２),r e spe c t i ve l yz y．The r e l a t i vepe rme ab i l i t i e so ft hec o r e swe r ede t e rmi ned us i ngt hei nduc t anc eLs me a su r edbyus i ngan Ag i Ｇ l en tE４９８０A Pr e c i s i onLCR Me t e rwi t hb i a scu r r en t sour c eo fAg i l en t４２８４１A．Thedoma i ns t ruc t u r e so f t her i bbonswe r eobs e r vedbyus i ngamagne t o Ｇ op t i Ｇ c a lKe r rmi c r o s c ope．
２ Re s u l t sandDi s c u s s i on
２ １ Ma n e t i cp r o e r t i e so fr i bb o n sw i t hf i e l da nn e a l i n g p g F i １and２showt heXRDpa t t e rnso ft her i b Ｇ gs bonsanne a l edwi t hanapp l i ed magne t i cf i e l d．Fr om F i １,i tc anbes e ent ha tt her i bbonso fFe６２－xNi１９Ｇ g ( , , ) CoxCu０１S i r１１ x＝０ ５ １０ we r ei namo r s phou ３ ８B １４C
F i ２ XRDpa t t e rno fFe７３５Cu１Nb３S i１５５B７ a l l o g y ann e a l e da t５８０ ℃ andFe６６Ni１０Cu１Nb３S i１１B９ a l l o e a l e da t５５０ ℃ f o r８０mi n yann
s t a t ea f t e ranne a l i ng a t３９０ ℃．F i ２r eve a l st he g Fe７３５Cu１Nb３S i１５５B７ andFe６６Ni１０Cu１Nb３S i１１B９ r i b Ｇ bonsc r t a l l i z edt ot het i c a lnanoc r t a l l i ne mi Ｇ ys yp ys c r os t ruc t ur ea f t e ranne a l i nga t５８０and５５０ ℃ ,r e Ｇ spe c t i ve l y． DC hys t e r e s i sl oopso ft heco r e s woundf r om r i bbonsanne a l edwi t hanapp l i edt r ansve r s emagne t Ｇ i cf i e l da r eshowni nF i ３．F Ｇ t t e r e s i sl oops g ypehys we r eob t a i nedduet oun i ax i a lan i so t r opype r i cu Ｇ pend l a rt ot hed i r e c t i ono ft her i bbonax i si nduc edbyt he f i e l da l i e di nt heann e a l i ngp r o c e s si nt heamo r s pp phou ( , , ) , Fe６２－xNi oxCu０１S i r１１ x ＝０ ５ １０ nano Ｇ １９C ３ ８B １４C c r t a l l i neFe７３５Cu１Nb３S i andFe６６Ni１０Cu１Nb３Ｇ ys １５ ５B ７, S i１１B９ a l l oys．Themagne t i cp r ope r t i e so fr i bbonsa f Ｇ t e rf i e l danne a l i nga r esumma r i z edi nTab l e１． I tc an bes e ent ha tt hecon t en t so fCoandNiobv i ous l f Ｇ ya f e c tt hemagne t i cp r ope r t i e so ft her i bbons． oxCu０１S i r１１( x＝０,５,１０) Fo rFe６２－xNi １９C ３ ８B １４C
１—Fe７３５Cu１Nb３S i e６６Ni u１Nb３S i １５ ５B ７; ２—F １０C １１B ９; ３—Fe６２Ni u０１S i r１１; ４—Fe５７Ni o５Cu０１S i Ｇ １９C ３ ８B １４C １９C ３ ８ B１４Cr１１; ５—Fe５２Ni o１０Cu０１S i r１１． １９C ３ ８B １４C
F i １ XRDpa t t e rno fFe６２－xNi１９CoxCu０１S i３８B１４Cr１１ g ( x＝０,５,１０)a l l o sann e a l e da t３９０ ℃ f o r２０mi n y
B — Magne t i cf l uxdens i t t i cf i e l ddens i t y; H — Magne y．
F i ３ DChy s t e r e s i sl o op so fc o r e swoundf r omr i bbon s g ann e a l e dwi t hat r an s v e r s ema e t i cf i e l d gn
I s sue２ Amo r CoCuS i BCrAl l oy swi t hSupe r i o rDi r e c tCu r r en tTo l e r an tCha r a c t e r i s t i c s phousFeNi Tab l e１ Ma e t i cp r op e r t i e so fc o r e swoundf r om gn r i bbon sann e a l e dwi t hat r an s v e r s ef i e l d Bs/
Ri bbon Fe６２Ni u０１S i r１１ １９C ３ ８B １４C
T
Hc/ mT ( Am－１)
Br/
μr
１ ２８７ ４ １０
２ １５０
１６５０
Fe５２Ni o１０Cu０１S i r１１ １ ２７２ ４ ３０ １９C ３ ８B １４C
３ ７３０
１０００
Fe５７Ni o５Cu０１S i r１１ １９C ３ ８B １４C
Fe７３５Cu１Nb３S i １５ ５B ７
Fe６６Ni u１Nb３S i １０C １１B ９
１ ２９３１１ ００
１ １７３ ２６ ７
１ １８１２０ ５２
５ ６４０
０ ４８０
６ ０６５
１４００
３７０００ ２４００
No t e:Bs—Sa t ur a t i onmagne t i ci nduc t i oni n t ens i t y; Br—Remanen tmagne t i ci nduc t i oni n t ens i t y; Hc—Coe r c i vef o r c e;μr—Re l a t i vepe rme ab i l i t y．
c r e a s edf r om １６５０t o１０００ wi t h Co r i bbons,μr de con t en ti nc r e a s i ngf r om０t o１０a t ％．Th i si nd i c a t e s at r ans ve r s e magne t i can i s o t r opyi nt hea l l oysi n Ｇ duc edbyt he rmomagne t i ct r e a tmen t,andt he mag Ｇ n i t udeo ft hec ons t an to f magne t i can i s o t r opyi n Ｇ c r e a s ed wi t hi nc r e a s i ngt heCoc on t en t．Mo r eove r,
t heva r i a t i ono fc o e r c i v ef o r c eo ft h eFe６２－x Ni oxＧ １９ C , , ) ( l l oys wa sde t e r Ｇ Cu０１S i３８B１４Cr１１ x ＝０ ５ １０ a mi nedp r obab l he magn i t udeo ft hes a t u r a t i on ybyt [ ] ma e t o s t r i c t i onw i t ha dd i t i ono fCoi n t ot h ea l l o s１４ ． gn y Espe c i a l l heva l ueo fc oe r c i vef o r c ewa sequa lt o y,t ５ ６４A/mf o rFe６２－x Ni１９CoxCu０１S i３８B１４Cr１１ ( x＝ ５)a l l oy,wh i chwa sl a r rt han２ １５and３ ７５A/m ge ( f o rFe６２－x Ni１９CoxCu０１S i３８B１４Cr１１ x ＝０,１０)a l Ｇ l oys,r e spe c t i ve l e su l t i ngf r omt henano c r t a l l i Ｇ y,r ys z a t i on o ft hea l l oy by t he rmomagne t i ct r e a tmen t． Ther e l a t i vepe rme ab i l i t fFe６６ Ni１０Cu１Nb３S i１１B９ yo and Fe７３５ Cu１Nb３S i１５５ B７ r i bbons we r e ２４００ and ３７０００a f t e rnano c r t a l l i neanne a l i ng wi t h an ap Ｇ ys l i edmagne t i cf i e l d,r e spe c t i ve l ss e Ｇ p y．When Niwa l e c t edt o pa r t l t i t u t ef o r Fe,Nia t omscon Ｇ y subs sumedanamoun to fFei nt heamo r s eand phouspha d imi n i shedt heexchangei n t e r a c t i onb e twe e nFea t oms [ ６] l a r e l s,t hec ons t an to fmagne t i can i s o t r opy g y ．Thu
１４７
en l a r t ht headd i t i ono fNiandt her e l a t i vepe r Ｇ gedwi me ab i l i t educ edobv i ous l yr y． F i ４d i sp l ayst he DC b i a sdependenc eo ft he g r e l a t i vepe rme ab i l i t fco r e swoundf r omt hef i e l d Ｇ yo anne a l edamo r i３８B１４Cr１１ phousFe６２－x Ni１９CoxCu０１S ( x＝０,５,１０)r i bbons．Asshowni nF i ４,t her e l Ｇ g a t i vepe rme ab i l i t scons t an tupt ot he DC b i a s y wa －４ －４ f i e l do fapp r ox ima t e l y６×１０ ,９×１０ ,and１０× １０－４ Tandt heva l ue so fr e l a t i vepe rme ab i l i t r e y we , , １６５０ １２００ and１０００wh i c ha r ox ima t et ot hed a t a pp l i s t e di nT ab l e１whe nt heCoc on t e n ti s０,５a t ％ ,and １０a t ％ ,r e spe c t i ve l e l a t i vepe rme ab i l i t Ｇ y．Ther yde c r e a s eds l i t l heDCb i a smagne t i cpr ope r t i e s gh yandt we r eop t imi z edwi t hi nc r e a s i ngt heCocon t en t．Th i s wa scons i s t en twi t ht hep r ope r t i e sshowni nF i ３． g
F i ４ DCb i a sf i e l dd ep end enc eo fr e l a t i v ep e rme ab i l i t f g yo c o r e swoundf r omamo rphou sFe６２－xNi１９CoxCu０１S i３８B１４Cr１１ ( x＝０,５,１０)r i bbon s
I nadd i t i on,F i ５showst hedoma i npa t t e rnso f g t heFe７３５Cu１Nb３S i１５５B７ andFe６６ Ni１０Cu１Nb３S i１１B９ a l l oysa f t e rf i e l dann e a l i ng． I tc anb es e e nt ha tt hez on a l doma i nso fnanoc r t a l l i neFe６６Ni１０Cu１Nb３S i１１B９ a l Ｇ ys l oyt urned mo r et r ansve r s ecompa r edt ot hos eo f Fe７３５Cu１Nb３S i１５５B７andobv i ous l t r a i t e n e dwi t ht he ys
F i ５ Doma i npa t t e rno fFe７３５Cu１Nb３S i１５５B７ ( a)andFe６６Ni１０Cu１Nb３S i１１B９ ( b)nano c r s t a l l i n ea l l o s g y y ann e a l e dwi t hanapp l i e dma e t i cf i e l d gn
J ou r na lo fI r onandS t e e lRe s e a r ch,I n t e r na t i ona l Vo l ２２
１４８
add i t i ono fNit or ep l a c eFe．Theop t imi z eddoma i n s t ruc t u r e si nd i c a t ed an e a s t i z a t i on p l ane y magne mo r epe r i cu l a rt ot her i bbonax i s．Ac c o r d i ng l pend y, t hecons t an to f magne t i can i s o t r opyi nc r e a s ed wi t h t hepa r t i a lsubs t i t u t i ono fNif o rFe,wh i chr e su l t ed i nt heobv i ouss l opeo fDChy s t e r e s i sl o op s,a ss hown i nF i ３． g ２ ２ Ma n e t i cp r o e r t i e so fr i bb o n sw i t hs t r e s sa nn e a l i n g p g F i ６s howst h eDChy s t e r e s i sl o op so ft h ec o r e s g woundf r omFe６２－x Ni oxCu０１S i r１１ ( x＝１,５) １９C ３ ８B １４C
r i bbonswh i ch we r eanne a l edunde rat ens i l es t r e s s o f１０５ MPaa l ongt her i bbonax i s．Fo rc ompa r i son, F Ｇ t t e r e s i sl oopo fFe７３５Cu１Nb３S i１５５B７r i bbon ypehys
sub e c t edt os t r e s sanne a l i ngi sg i veni nF i ６． ComＧ j g r edwi t ht hecons t an tp e rme ab l ep r op e r t fFe７３５Ｇ pa yo Cu１Nb３S i１５５B７ a l l oy wh i c hwa sob t a i n e ddu et oaun i Ｇ ax i a lan i so t r opype r i cu l a rt ot hed i r e c t i ono ft he pend r i bbonax i si nduc edbys t r e s sanne a l i ng,t heDChys Ｇ i３８B１４Cr１１ ( x＝ t e r e s i sl oopso fFe６２－x Ni１９CoxCu０１S １,５)a l l oyswe r ee r e c tev i den t l l e２r eve a l st he y．Tab magne t i cpr ope r t i e so fs t r e s s Ｇ anne a l edr i bbons．The amo r t a t eo fs t r e s s Ｇ ann e a l e d Fe６２－x Ni oxＧ phouss １９ C , ) ( Cu０１S i３８B１４Cr１１ x ＝１ ５ r i bbonswa scon f i rmed byt heXRD me a sur emen t． I ti sknownt ha tt hes a t u Ｇ ( r a t i on magne t os t r i c t i oncons t an tλs o ft heα ＧFe S i) [ １５] nanoc r t a l l i ne pha s ei snega t i ve ;t hus,Ku i n Ｇ ys duc edbys t r e s sanne a l i ngf o rFe７３５Cu１Nb３S i１５５B７
１—Fe６１Ni o１Cu０１S i r１１anne a l eda t４００ ℃ ; ２—Fe６１Ni o１Cu０１S i r１１anne a l eda t３６０ ℃ ; ３—Fe７３５Cu１Nb３S i １９C ３ ８B１４C １９C ３ ８B １４C １５ ５B ７ anne a l eda t５８０ ℃ ; ４—Fe５７Ni o５Cu０１S i r１１anne a l eda t４５０ ℃ ; ５—Fe５７Ni o５Cu０１S i r１１anne a l eda t３６０ ℃ ; １９C ３ ８B １４C １９C ３ ８B １４C ６—Fe５７Ni o５Cu０１S i r１１anne a l eda t４００ ℃． １９C ３ ８B １４C
F i ６ DChy s t e r e s i sl o op so fc o r e swoundf r omFe６１Ni１９Co１Cu０１S i３８B１４Cr１１ ( a)andFe５７Ni１９Co５Cu０１S i３８B１４Cr１１ ( b) g r i bbon sann e a l e dwi t hat en s i l es t r e s so f１０５ MPaa td i f f e r en tt emp e r a t u r e s Tab l e２ Ma e t i cp r op e r t i e so fc o r e swoundf r om gn Fe６２－xNi１９CoxCu０１S i３８B１４Cr１１ ( x＝１,５)and Fe７３５Cu１Nb３S i１５５B７ a l l o i bbon ss t r e s s Ｇ yr ann e a l e da td i f f e r en tt emp e r a t u r e s
Ri bbon Fe６１Ni o１Cu０１S i r１１ １９C ３ ８B １４C
Ta/ B４０００/ Br/ ℃
T
T
３６０ １ １５ ０ ７０ ３８０ １ ２１ ０ ７２ ４００ １ １７ ０ ７０ ４２０ １ １５ ０ ６８
Fe５７Ni o５Cu０１S i r１１ １９C ３ ８B １４C
４５０ １ １５ ０ ６７
３６０ １ １８ ０ ７４
１０ ７６ １１ ６２ １１ ５６ １６ ９７ ３４ ４２ ７ ２８
３８０ １ ２０ ０ ７４
７ １３
４２０ １ １４ ０ ７１
７ ２７
４００ １ ２１ ０ ７３
Fe７３５Cu１Nb３S i １５ ５B ７
Hc/ ( Am－１)
４５０ １ ０８ ０ ６７ ５８０ １ １７ ０ ０１
６ ７６ １１ ２２ ２９ ６６
No t e:Ta—Anne a l i ngt empe r a t ur e;B４０００— Magne t i ci nduc t i on i n t ens i t a sur eda tamagne t i cf i e l do f４０００A/m． yme
nanoc r t a l l i nea l l oyswa spe r i cu l a rt ot her i b Ｇ ys pend bonax i sandgene r a t edt hes l opedhys t e r e s i sl oopso f co r e s．Fr om F i ６,t hea lmos ts t r a i thys t e r e s i s g gh l oopsdemons t r a t et het i nyKui nduc edbys t r e s san Ｇ ne a l i ngf o ramo r i３８B１４Ｇ phousFe６２－x Ni１９ CoxCu０１S Cr１１ ( x ＝１,５)a l l oys,andi nd i r e c t l r o he y p vet r obab l i t i ves a t ur a t i on magne t os t r i c t i on con Ｇ p y pos s t an to ft heamo r i３８B１４Ｇ phousFe６２－x Ni１９CoxCu０１S Cr１１( x＝１,５)pha s e．Mo r eove r,i nt heexpe r imen Ｇ t a lr ange,t heanne a l i ngt empe r a t ur e shadne a r l yno i n f l uenc eonλs． ２ ３ Op t imi z e d DCb i a sp r o e r t i e so fF e６２－x N i oxＧ １９C p Cu０１S i３８B１４Cr１１ amo r sa l l o s phou y Byt heaboveexpe r imen t a lr e su l t s,Fe６２－x Ni１９Ｇ ( , , ) CoxCu０１S i３８B１４Cr１１ x ＝０ ５ １０ r i bbonsa f t e r t he rmomagne t i ct r e a tmen tob t a i ned p r e f e r ab l e DC
I s sue２ Amo r CoCuS i BCrAl l oy swi t hSupe r i o rDi r e c tCu r r en tTo l e r an tCha r a c t e r i s t i c s phousFeNi
t o l e r an tpr ope r t i e s,andt he mo s top t imi z edp r ope r Ｇ t i e sa r eob t a i nedwhent heCoc on t en twa s１０a t ％． F i ７g i ve st he DC hys t e r e s i sl oopso fFe６２－x Ni１９Ｇ g ( , ) CoxCu０１S i３８B１４Cr１１ x＝５ １０ amo r l l oys． phousa Comme r c i a lFe Ｇ ba s ednano c r t a l l i nec o r e swe r ea l so ys i v e nf o rc o m a r i s o n． T h ea m o r h o u sa l l o sa t x ＝ g p p y , １０exh i b i t edsupe r i o rDCr e s i s t an tp r ope r t i e si e , f１１００ A/m,c ompa r ed wi t h an i so t r opyf i e l d Ha o t hos eo f６００and８００A/mf o rFe Ｇ ba s ednano c r s t a l y Ｇ , , l i nea l l oya tx＝５ r e spe c t i ve l Cons equen t l i Ｇ y． y add t i ono fad e f i n e damoun to fCoi n t oFeNi CuS i BCramo r Ｇ sa l l oysc ou l dp r ov i deapo t en t i a lapp l i c a t i oni n phou DCt o l e r an tcu r r en tt r ans f o rme rc o r e s．
１４９
momagne t i ct r e a tme n twe r eimp r ov e dwi t hi nc r e a s i ng t heCocont entandwe r esupe r i o rt ot hos eo fFe７３５Ｇ Cu１Nb３S i１５５B７ andFe６６Ni１０Cu１Nb３S i１１B９ nanoc r Ｇ ys t a l l i nea l l oys． ( ２)Theve r t i c a lhys t e r e s i sl oopso fFe６２－xNi１９Ｇ CoxCu０１S i３８B１４Cr１１ ( x ＝１,５)a l l oysa f t e rs t r e s s anne a l i nggaveev i denc eo ft hep r obab l i t i ves a t Ｇ ypos ur a t i onmagne t os t r i c t i ono ft heamo r l l oys． phousa ( ３)Comp a r e d wi t hc omme r c i a lFe Ｇb a s e dn ano Ｇ c r s t a l l i n ea l l oysus edi ncur r en tt r ans f o rme r sco r e s, y DCt o l e r an tp r ope r t i e so fFe６２－xNi１９CoxCu０１S i３８B１４Ｇ Cr１１amo r l l oyswe r ep r omo t edwi t hcons t an t phousa r e l a t i vepe rme ab i l i t r ovedan i so t r opyf i e l d． yandimp ( ４)Theadd i t i ono fNii nt heF i neme t Ｇ t l Ｇ ypea l oysl e adst ot he magne t i can i so t r opycons t an ten Ｇ l a r i chr e su l t edi nt hel i ne a rhys t e r e s i sl oops ged,wh o fr i bbons． Re f e r enc e s:
Thea r r owi nd i c a t e st hede f i n i t i ono ft hean i s o t r opyf i e l d Ha．
F i ７ DChy s t e r e s i sl o op so fc o r e swoundf r omr i bbon so f g c omme r c i a lFe Ｇ ba s e dnano c r s t a l l i n ea l l o sandamo rphou s y y a l l o sFe６２－xNi１９CoxCu０１S i３８B１４Cr１１ ( x＝５,１０) y
３ Conc l u s i on s ( １)TheCoadd i t i onhadane f f e c tonmagne t i c r o e r t i e so f a m o r h o u sa l l o s ． T h er e l a t i v e e r m e Ｇ p p p y p ab i l i t c r e a s edwi t ht hei nc r e a s eo fCoc on t en tand yde t heva r i a t i ono fc oe r c i vef o r c eo ft hea l l oysduet ot he magne t i can i s o t r opyi nduc edi nt h e Fe６２－x Ni C o １９ xＧ ( , , ) Cu０１S i３８B１４Cr１１ x＝０ ５ １０ amo r l l oysby phousa t he rmomagne t i ct r e a tmen t．TheDCt o l e r anc epr op Ｇ e r t i e so ft heamorphousr i bbonssub e c t edt othe r Ｇ j
[ １] G．He r z e r,IEEE Tr ans．Magn． ２６ ( １９９０)１３９７ Ｇ １４０２． [ ２] A．He r nando,M．Vá z z,T．Ku l i k,C． Pr ado s,Phys．Rev． B que ５１ ( １９９５)３５８１ Ｇ ３５８６． [ ３] G．He r z e r,IEEE Tr ans．Magn． ２５ ( １９８９)３３２７ Ｇ ３３２９． [ ４] M．Ohnuma,D H．P i ng,T．Abe,H．Onode r a,K．Hono,Y． Yo sh i z awa,J．App l．Phys． ９３ ( ２００３)９１８６ Ｇ ９１９４． [ , ５] Y．Yo sh i z awa,S．Fu i i D H． P i ng,M．Ohnuma,K．Hono, j Sc r i t a Ma t e r． ４８ ( ２００３)８６３ Ｇ ８６８． p [ ６] YY． J i a,Z．Wang,R M． Sh i,J．Yang,HJ．Kang,T．L i n, J．App l．Phys． １０９ ( ２０１１)０７３９１７． [ ７] NI．No skova,VV． Shu l i ka,AP． Po t apov,Phys．Me t．Me t Ｇ a l l og r． １０２ ( ２００６)５０６ Ｇ ５１１． [ ８] Y．Yo sh i z awa,K．Yamauch i,IEEE Tr ans．Magn．５ ( １９９０) １０７０ Ｇ １０７６． [ ９] G．He r z e r,Ma t e r． Sc i．Eng．A１８１ Ｇ １８２ ( １９９４)８７６ Ｇ ８７９． [ １０] L．Kr aus,K．Zave t a,O．He c zko,P．Duha a s ak,J． j,G．Vl Schne i de r,J．Magn．Magn．Ma t e r． １１２ ( １９９２)２７５ Ｇ ２７７． [ １１] G．He r z e r,IEEE Tr ans．Magn． ３０ ( １９９４)４８００ Ｇ ４８０２． [ １２] B．Ho fma nn,H．Kr onmü l l e r,J．Ma t e r． １５２ ( １９９６) gn．Ma gn．Ma
９１ Ｇ ９８． [ l ak,Phys． S t a t usSo l i d iB２４８ １３] G．He r z e r,V．Bud i nsky,C．Po ( ２０１１)２３８２ Ｇ ２３８８． [ １４] A．Ko l ano ＧBur i an,T．Ku l i k,G．Vl a s ak,J．Fe r enc,L K． Va r t e r． ２７２ Ｇ ２７６ ( ２００４)１４４７ Ｇ １４４８． ga,J．Magn．Magn．Ma [ １５] G．He r z e r,J．Magn．Magn．Ma t e r． １１２ ( １９９２)２５８ Ｇ ２６２．
JOURNALOFIRON ANDSTEELRESEARCH,INTERNATIONAL２ ０ １ ５,２ ２( ２):１ ４ ５ Ｇ １ ４ ９
Amo r sFeNi CoCuS i BCrAl l o swi t hSupe r i o rDi r e c tCu r r e n t phou y To l e r an tCha r a c t e r i s t i c s Xi ao Ｇ r ong WU１ ２ , De Ｇ r enLI１ ２ , ZhunLI１ ２ , Zh i Ｇ chaoLU１ ２ ,
,
,
,
( １．Ch i naI r onandS t e e lRe s e a r chI ns t i t u t eGr oup,Be i i ng１０００８１,Ch i na; ２．Advanc edTe chno l ogyand j Ma t e r i a l sCo ,Lt d ,Be i i ng１０００８１,Ch i na) j Ab s t r a c t:Amo r １９CoxCu０１S i r１１ ( x＝０,１,５,１０)r i bbonswe r eanne a l edunde rmagne t i cf i e l d phousFe６２－x Ni ３ ８B １４C andt ens i l es t r e s s,r e spe c t i ve l he i rmagne t i cp r ope r t i e swe r ei nve s t i t ed．Fe７３５Cu１Nb３S i ndFe６６Ni Ｇ y,andt ga １５ ５B ７a １０ Cu１Nb３S i ano c r s t a l l i nea l l oyr i bbonswe r ea l s of ab r i c a t edf o rc ompa r i s on．Exc e l l en tDCt o l e r an tp r ope r t s y ywa １１B ９n ob t a i nedi nt heamo r CoCuS i BCrr i bbonsa f t e rt he rmomagne t i ct r e a tmen tandt hec ons t an tpe rme ab l e phous FeNi r ope r t simp r ovedwi t hi nc r e a s i ngCoc on t en t．Ther e l a t i vepe rme ab i l i t sc ons t an tupt ot heDCb i a sf i e l do f p ywa ywa －４ －４ －４ app r ox ima t e l heva l ue so fr e l a t i vepe rme ab i l i t r e１６５０,１２００,and y６×１０ ,９×１０ ,and１０×１０ Tandt yμr we １０００wi t ht heCoc on t en tbe i ng０,５a t ％ ,and１０a t ％ ,r e spe c t i ve l Be s i de s,s t r e s s Ｇ anne a l edFeNi CoCuS i BCra l Ｇ y． l oyr i bbonswe r ep r ovedt oexh i b i tpo s i t i ves a t u r a t i onmagne t o s t r i c t i onc ons t an tλs． Ke r d s:Fe Ｇba s edamo r l l oy;magne t i cp r ope r t i e l danne a l i ng;s t r e s sanne a l i ng;doma i ns t r uc t u r e phousa y;f ywo
Cu r r en t l hema t e r i a l sapp l i edi nt hec o r e sf o r y,t DCt o l e r an tcu r r en tt r ans f o rme r sma i n l nc l udeFe Ｇ yi ba s edamo r c r t a l l i nec ompo s i t ema Ｇ phousandnano ys t e r i a landCo Ｇ ba s edamo r l l oys．Fe Ｇ ba s eda l Ｇ phousa l oyshavel owe rp r i c e sbu tr educ edDCt o l e r an tpr op Ｇ e r t i e s,c ompa r ed wi t h Co Ｇ ba s edt a t t e ri s ype．Thel r e f e r r edduet ot heexc e l l en tDCt o l e r an tp r ope r t i e s p i nt heh i Ｇ endma rke t sde sp i t et heh i o s t． gh ghc Fe Ｇ b a s e dn a no c r s t a l l i n ea ndamo r ss o f tma Ｇ y phou g n e t i ca l l o s,e xh i b i t i ngu l t r a h i a t u r a t i on ma e t i z a Ｇ y ghs gn , , t i on h i t i cpe rme ab i l i t owc oe r c i vef o r c e gh magne yl andl owc o r el o s s,a r ea t t r a c t i ng mo r eand mo r ei n Ｇ [ ,] t e r e s t s１ ２ ．Theexc e l l en ts o f t magne t i cp r ope r t i e s a r ea t t r i bu t edt ot hef o rma t i ono fbc cα ＧFe( S i)nano Ｇ c r t a l l i ne g r a i ns d i spe r s edi nr e s i dua lamo r ys phous ma t r i x,andexchangei n t e r a c t i onsbe twe enad a c en t j α ＧFe( S i)n a nog r a i n sv i at h er e s i du a lamo r h o u s h a s p p e [ ] wh i chave r aget hemagne t o c r t a l l i nean i s o t r opy１Ｇ３ ． ys I ti swe l lknownt ha tadd i ngNiandCoi nnano Ｇ c r s t a l l i n ea l l o si n c r e a s e st h e m a n e t i ca n i s o t r o y y g py cons t an tKu．Al a r animp r ovet hes o f tmag Ｇ geKu c [ ,] ne t i cpr ope r t i e si nah i r r en tr eg i on４ ５ ．Mag Ｇ ghcu ne t i cpr ope r t i e schangeowi ngt ot heva r i a t i ono ft he
e f f e c t i vean i so t r opy wi t hNiadd i t i on６ ． Subs t i t u t i on o fCof o r Fei nF i neme t Ｇ t l l oyssub e c t ed t o ypea j [] t he rmomagne t i ct r e a tmen t７ andt he magn i t udeo f t hei nduc ed magne t i can i so t r opycons t an thavea l so [] be ens t ud i ed４ ． Howeve r,t hei n f l uenc eo fi n t r oduc t i ono fCo i n t ot heFeNiCuS i BCramo r l l oyont hemag Ｇ phousa ne t i cp r ope r t i e si nduc ed by t he rmomagne t i ct r e a t Ｇ men to rs t r e s sanne a l i ngha sno tbe eni nve s t i t ed． ga Mo r eove r,t hehys t e r e s i sl oopso fso f tmagne t i ca l Ｇ l oysc anbet a i l o r edbyun i ax i a lan i so t r op i e si nduc ed i nt hep r oc e s so fanne a l i ng wi t hanapp l i edmagne t i c [ ,] [ ] f i e l d８ ９ o runde rt ens i l es t r e s s１０Ｇ１３ ．Cons equen t l y, []
i no rde rt oimpr ovet hed i r e c tcur r en tt o l e r an tpr op Ｇ , ( , , e r t i e s Fe６２－xNi１９CoxCu０１S i３８B１４Cr１１ x ＝０ １ ５, １０)amo r l l oysunde rva r i oust r e a tmen tcon Ｇ phousa d i t i onswe r ei nve s t i t ed． ga
１ Exp e r imen t a lMe t hod
Me l t Ｇ spunFe６２－x Ni１９CoxCu０１S i３８B１４Cr１１ ( x＝ , , , ) ０ １ ５ １０ amo r i bbonso f６ mmi n wi d t h phousr andabou t２０ μmi nt h i ckne s swe r ewoundi n t ot o Ｇ r o i da lco r e s．Theco r es i z ewa sϕ２３ ２ mm ( ou t s i de
Founda t i onI t em: I t em Spons o r edbyNa t i ona lHi Ｇ t e chRe s e a r chandDeve l opmen tPr o r amo fCh i n a( ２０１２AA０３０３０１);Na t i ona lNa t ur a lSc i enc e gh g Founda t i ono fCh i na ( ５１０７１０５０) B i o r aphy: Xi ao Ｇ r ong WU,Ma s t e r; E Ｇma i l: wxr １０２１＠１２６ c om; Re c e i v e dDa t e:Oc t obe r２１,２０１３ g
１４６
J ou r na lo fI r onandS t e e lRe s e a r ch,I n t e r na t i ona l Vo l ２２
d i ame t e r)×ϕ１７ ８ mm ( i ns i ded i ame t e r)×６mm． I n af i r s ts e r i e so fexpe r imen t s,c o r e s wound f r om Fe６２－xNi１９CoxCu０１S i３８B１４Cr１１ ( x ＝０,５,１０)a l l oy r i bbonswe r eanne a l eda t３９０ ℃f o r２０mi ni nN２a t Ｇ mosphe r eunde rat r ans ve r s emagne t i cf i e l do fabou t ３５ mTt oi nduc eaun i ax i a lan i s o t r opy,ba s edont he d i f f e r en t i a ls c ann i ngc a l o r ime t r DSC)r e su l t． I na y( s e conds e r i e so fexpe r imen t s,Fe６２－x Ni１９ CoxCu０１Ｇ S i３８B１４Cr１１ ( x ＝１,５)a l l oyr i bbonswe r eanne a l ed f１０５ MPa．Thes t r e s swa s unde rat ens i l es t r e s sσao app l i eda l ongt her i bbonax i st oa ch i evei nduc edan i Ｇ so t r opy by c on t i nuous l s s i ng t hr ough an open y pa f urna c e．Th er i bbon sa f t e rs t r e s s Ｇ a nn e a l i ngwe r ewound i n t ot o l o i da lc o r e ss imi l a r l Fe７３５Cu１Nb３S i１５５B７and y． Fe６６Ni１０Cu１Nb３S i１１B９ a l l oyr i bbonsandc o r e sunde r op t imum anne a l i ng c ond i t i ons we r ea l s of ab r i c a t ed f o rcompa r i s on． DSCcu r ve so ft her i bbons we r e me a su r edby DSC４０４Ca tahe a t i ngr a t eo f１０K/s．XＧ r ayd i f f r a c Ｇ t i on ( XRD)pa t t e rnso ft hes amp l e swe r eexami ned us i ngaBruke rD８ Advanc eXＧ r ayd i f f r a c t ome t e ra t r oomt empe r a t u r ea f t e ranne a l i ng．TheDCand AC magne t i cpr ope r t i e so ft hewoundc o r e swe r e me a s Ｇ ( ) ur edwi t haB ＧHt r a c e r MATS Ｇ ２０１０SD andaB ＧH ana l e r( IWATSU SYＧ ８２３２),r e spe c t i ve l yz y．The r e l a t i vepe rme ab i l i t i e so ft hec o r e swe r ede t e rmi ned us i ngt hei nduc t anc eLs me a su r edbyus i ngan Ag i Ｇ l en tE４９８０A Pr e c i s i onLCR Me t e rwi t hb i a scu r r en t sour c eo fAg i l en t４２８４１A．Thedoma i ns t ruc t u r e so f t her i bbonswe r eobs e r vedbyus i ngamagne t o Ｇ op t i Ｇ c a lKe r rmi c r o s c ope．
２ Re s u l t sandDi s c u s s i on
２ １ Ma n e t i cp r o e r t i e so fr i bb o n sw i t hf i e l da nn e a l i n g p g F i １and２showt heXRDpa t t e rnso ft her i b Ｇ gs bonsanne a l edwi t hanapp l i ed magne t i cf i e l d．Fr om F i １,i tc anbes e ent ha tt her i bbonso fFe６２－xNi１９Ｇ g ( , , ) CoxCu０１S i r１１ x＝０ ５ １０ we r ei namo r s phou ３ ８B １４C
F i ２ XRDpa t t e rno fFe７３５Cu１Nb３S i１５５B７ a l l o g y ann e a l e da t５８０ ℃ andFe６６Ni１０Cu１Nb３S i１１B９ a l l o e a l e da t５５０ ℃ f o r８０mi n yann
s t a t ea f t e ranne a l i ng a t３９０ ℃．F i ２r eve a l st he g Fe７３５Cu１Nb３S i１５５B７ andFe６６Ni１０Cu１Nb３S i１１B９ r i b Ｇ bonsc r t a l l i z edt ot het i c a lnanoc r t a l l i ne mi Ｇ ys yp ys c r os t ruc t ur ea f t e ranne a l i nga t５８０and５５０ ℃ ,r e Ｇ spe c t i ve l y． DC hys t e r e s i sl oopso ft heco r e s woundf r om r i bbonsanne a l edwi t hanapp l i edt r ansve r s emagne t Ｇ i cf i e l da r eshowni nF i ３．F Ｇ t t e r e s i sl oops g ypehys we r eob t a i nedduet oun i ax i a lan i so t r opype r i cu Ｇ pend l a rt ot hed i r e c t i ono ft her i bbonax i si nduc edbyt he f i e l da l i e di nt heann e a l i ngp r o c e s si nt heamo r s pp phou ( , , ) , Fe６２－xNi oxCu０１S i r１１ x ＝０ ５ １０ nano Ｇ １９C ３ ８B １４C c r t a l l i neFe７３５Cu１Nb３S i andFe６６Ni１０Cu１Nb３Ｇ ys １５ ５B ７, S i１１B９ a l l oys．Themagne t i cp r ope r t i e so fr i bbonsa f Ｇ t e rf i e l danne a l i nga r esumma r i z edi nTab l e１． I tc an bes e ent ha tt hecon t en t so fCoandNiobv i ous l f Ｇ ya f e c tt hemagne t i cp r ope r t i e so ft her i bbons． oxCu０１S i r１１( x＝０,５,１０) Fo rFe６２－xNi １９C ３ ８B １４C
１—Fe７３５Cu１Nb３S i e６６Ni u１Nb３S i １５ ５B ７; ２—F １０C １１B ９; ３—Fe６２Ni u０１S i r１１; ４—Fe５７Ni o５Cu０１S i Ｇ １９C ３ ８B １４C １９C ３ ８ B１４Cr１１; ５—Fe５２Ni o１０Cu０１S i r１１． １９C ３ ８B １４C
F i １ XRDpa t t e rno fFe６２－xNi１９CoxCu０１S i３８B１４Cr１１ g ( x＝０,５,１０)a l l o sann e a l e da t３９０ ℃ f o r２０mi n y
B — Magne t i cf l uxdens i t t i cf i e l ddens i t y; H — Magne y．
F i ３ DChy s t e r e s i sl o op so fc o r e swoundf r omr i bbon s g ann e a l e dwi t hat r an s v e r s ema e t i cf i e l d gn
I s sue２ Amo r CoCuS i BCrAl l oy swi t hSupe r i o rDi r e c tCu r r en tTo l e r an tCha r a c t e r i s t i c s phousFeNi Tab l e１ Ma e t i cp r op e r t i e so fc o r e swoundf r om gn r i bbon sann e a l e dwi t hat r an s v e r s ef i e l d Bs/
Ri bbon Fe６２Ni u０１S i r１１ １９C ３ ８B １４C
T
Hc/ mT ( Am－１)
Br/
μr
１ ２８７ ４ １０
２ １５０
１６５０
Fe５２Ni o１０Cu０１S i r１１ １ ２７２ ４ ３０ １９C ３ ８B １４C
３ ７３０
１０００
Fe５７Ni o５Cu０１S i r１１ １９C ３ ８B １４C
Fe７３５Cu１Nb３S i １５ ５B ７
Fe６６Ni u１Nb３S i １０C １１B ９
１ ２９３１１ ００
１ １７３ ２６ ７
１ １８１２０ ５２
５ ６４０
０ ４８０
６ ０６５
１４００
３７０００ ２４００
No t e:Bs—Sa t ur a t i onmagne t i ci nduc t i oni n t ens i t y; Br—Remanen tmagne t i ci nduc t i oni n t ens i t y; Hc—Coe r c i vef o r c e;μr—Re l a t i vepe rme ab i l i t y．
c r e a s edf r om １６５０t o１０００ wi t h Co r i bbons,μr de con t en ti nc r e a s i ngf r om０t o１０a t ％．Th i si nd i c a t e s at r ans ve r s e magne t i can i s o t r opyi nt hea l l oysi n Ｇ duc edbyt he rmomagne t i ct r e a tmen t,andt he mag Ｇ n i t udeo ft hec ons t an to f magne t i can i s o t r opyi n Ｇ c r e a s ed wi t hi nc r e a s i ngt heCoc on t en t．Mo r eove r,
t heva r i a t i ono fc o e r c i v ef o r c eo ft h eFe６２－x Ni oxＧ １９ C , , ) ( l l oys wa sde t e r Ｇ Cu０１S i３８B１４Cr１１ x ＝０ ５ １０ a mi nedp r obab l he magn i t udeo ft hes a t u r a t i on ybyt [ ] ma e t o s t r i c t i onw i t ha dd i t i ono fCoi n t ot h ea l l o s１４ ． gn y Espe c i a l l heva l ueo fc oe r c i vef o r c ewa sequa lt o y,t ５ ６４A/mf o rFe６２－x Ni１９CoxCu０１S i３８B１４Cr１１ ( x＝ ５)a l l oy,wh i chwa sl a r rt han２ １５and３ ７５A/m ge ( f o rFe６２－x Ni１９CoxCu０１S i３８B１４Cr１１ x ＝０,１０)a l Ｇ l oys,r e spe c t i ve l e su l t i ngf r omt henano c r t a l l i Ｇ y,r ys z a t i on o ft hea l l oy by t he rmomagne t i ct r e a tmen t． Ther e l a t i vepe rme ab i l i t fFe６６ Ni１０Cu１Nb３S i１１B９ yo and Fe７３５ Cu１Nb３S i１５５ B７ r i bbons we r e ２４００ and ３７０００a f t e rnano c r t a l l i neanne a l i ng wi t h an ap Ｇ ys l i edmagne t i cf i e l d,r e spe c t i ve l ss e Ｇ p y．When Niwa l e c t edt o pa r t l t i t u t ef o r Fe,Nia t omscon Ｇ y subs sumedanamoun to fFei nt heamo r s eand phouspha d imi n i shedt heexchangei n t e r a c t i onb e twe e nFea t oms [ ６] l a r e l s,t hec ons t an to fmagne t i can i s o t r opy g y ．Thu
１４７
en l a r t ht headd i t i ono fNiandt her e l a t i vepe r Ｇ gedwi me ab i l i t educ edobv i ous l yr y． F i ４d i sp l ayst he DC b i a sdependenc eo ft he g r e l a t i vepe rme ab i l i t fco r e swoundf r omt hef i e l d Ｇ yo anne a l edamo r i３８B１４Cr１１ phousFe６２－x Ni１９CoxCu０１S ( x＝０,５,１０)r i bbons．Asshowni nF i ４,t her e l Ｇ g a t i vepe rme ab i l i t scons t an tupt ot he DC b i a s y wa －４ －４ f i e l do fapp r ox ima t e l y６×１０ ,９×１０ ,and１０× １０－４ Tandt heva l ue so fr e l a t i vepe rme ab i l i t r e y we , , １６５０ １２００ and１０００wh i c ha r ox ima t et ot hed a t a pp l i s t e di nT ab l e１whe nt heCoc on t e n ti s０,５a t ％ ,and １０a t ％ ,r e spe c t i ve l e l a t i vepe rme ab i l i t Ｇ y．Ther yde c r e a s eds l i t l heDCb i a smagne t i cpr ope r t i e s gh yandt we r eop t imi z edwi t hi nc r e a s i ngt heCocon t en t．Th i s wa scons i s t en twi t ht hep r ope r t i e sshowni nF i ３． g
F i ４ DCb i a sf i e l dd ep end enc eo fr e l a t i v ep e rme ab i l i t f g yo c o r e swoundf r omamo rphou sFe６２－xNi１９CoxCu０１S i３８B１４Cr１１ ( x＝０,５,１０)r i bbon s
I nadd i t i on,F i ５showst hedoma i npa t t e rnso f g t heFe７３５Cu１Nb３S i１５５B７ andFe６６ Ni１０Cu１Nb３S i１１B９ a l l oysa f t e rf i e l dann e a l i ng． I tc anb es e e nt ha tt hez on a l doma i nso fnanoc r t a l l i neFe６６Ni１０Cu１Nb３S i１１B９ a l Ｇ ys l oyt urned mo r et r ansve r s ecompa r edt ot hos eo f Fe７３５Cu１Nb３S i１５５B７andobv i ous l t r a i t e n e dwi t ht he ys
F i ５ Doma i npa t t e rno fFe７３５Cu１Nb３S i１５５B７ ( a)andFe６６Ni１０Cu１Nb３S i１１B９ ( b)nano c r s t a l l i n ea l l o s g y y ann e a l e dwi t hanapp l i e dma e t i cf i e l d gn
J ou r na lo fI r onandS t e e lRe s e a r ch,I n t e r na t i ona l Vo l ２２
１４８
add i t i ono fNit or ep l a c eFe．Theop t imi z eddoma i n s t ruc t u r e si nd i c a t ed an e a s t i z a t i on p l ane y magne mo r epe r i cu l a rt ot her i bbonax i s．Ac c o r d i ng l pend y, t hecons t an to f magne t i can i s o t r opyi nc r e a s ed wi t h t hepa r t i a lsubs t i t u t i ono fNif o rFe,wh i chr e su l t ed i nt heobv i ouss l opeo fDChy s t e r e s i sl o op s,a ss hown i nF i ３． g ２ ２ Ma n e t i cp r o e r t i e so fr i bb o n sw i t hs t r e s sa nn e a l i n g p g F i ６s howst h eDChy s t e r e s i sl o op so ft h ec o r e s g woundf r omFe６２－x Ni oxCu０１S i r１１ ( x＝１,５) １９C ３ ８B １４C
r i bbonswh i ch we r eanne a l edunde rat ens i l es t r e s s o f１０５ MPaa l ongt her i bbonax i s．Fo rc ompa r i son, F Ｇ t t e r e s i sl oopo fFe７３５Cu１Nb３S i１５５B７r i bbon ypehys
sub e c t edt os t r e s sanne a l i ngi sg i veni nF i ６． ComＧ j g r edwi t ht hecons t an tp e rme ab l ep r op e r t fFe７３５Ｇ pa yo Cu１Nb３S i１５５B７ a l l oy wh i c hwa sob t a i n e ddu et oaun i Ｇ ax i a lan i so t r opype r i cu l a rt ot hed i r e c t i ono ft he pend r i bbonax i si nduc edbys t r e s sanne a l i ng,t heDChys Ｇ i３８B１４Cr１１ ( x＝ t e r e s i sl oopso fFe６２－x Ni１９CoxCu０１S １,５)a l l oyswe r ee r e c tev i den t l l e２r eve a l st he y．Tab magne t i cpr ope r t i e so fs t r e s s Ｇ anne a l edr i bbons．The amo r t a t eo fs t r e s s Ｇ ann e a l e d Fe６２－x Ni oxＧ phouss １９ C , ) ( Cu０１S i３８B１４Cr１１ x ＝１ ５ r i bbonswa scon f i rmed byt heXRD me a sur emen t． I ti sknownt ha tt hes a t u Ｇ ( r a t i on magne t os t r i c t i oncons t an tλs o ft heα ＧFe S i) [ １５] nanoc r t a l l i ne pha s ei snega t i ve ;t hus,Ku i n Ｇ ys duc edbys t r e s sanne a l i ngf o rFe７３５Cu１Nb３S i１５５B７
１—Fe６１Ni o１Cu０１S i r１１anne a l eda t４００ ℃ ; ２—Fe６１Ni o１Cu０１S i r１１anne a l eda t３６０ ℃ ; ３—Fe７３５Cu１Nb３S i １９C ３ ８B１４C １９C ３ ８B １４C １５ ５B ７ anne a l eda t５８０ ℃ ; ４—Fe５７Ni o５Cu０１S i r１１anne a l eda t４５０ ℃ ; ５—Fe５７Ni o５Cu０１S i r１１anne a l eda t３６０ ℃ ; １９C ３ ８B １４C １９C ３ ８B １４C ６—Fe５７Ni o５Cu０１S i r１１anne a l eda t４００ ℃． １９C ３ ８B １４C
F i ６ DChy s t e r e s i sl o op so fc o r e swoundf r omFe６１Ni１９Co１Cu０１S i３８B１４Cr１１ ( a)andFe５７Ni１９Co５Cu０１S i３８B１４Cr１１ ( b) g r i bbon sann e a l e dwi t hat en s i l es t r e s so f１０５ MPaa td i f f e r en tt emp e r a t u r e s Tab l e２ Ma e t i cp r op e r t i e so fc o r e swoundf r om gn Fe６２－xNi１９CoxCu０１S i３８B１４Cr１１ ( x＝１,５)and Fe７３５Cu１Nb３S i１５５B７ a l l o i bbon ss t r e s s Ｇ yr ann e a l e da td i f f e r en tt emp e r a t u r e s
Ri bbon Fe６１Ni o１Cu０１S i r１１ １９C ３ ８B １４C
Ta/ B４０００/ Br/ ℃
T
T
３６０ １ １５ ０ ７０ ３８０ １ ２１ ０ ７２ ４００ １ １７ ０ ７０ ４２０ １ １５ ０ ６８
Fe５７Ni o５Cu０１S i r１１ １９C ３ ８B １４C
４５０ １ １５ ０ ６７
３６０ １ １８ ０ ７４
１０ ７６ １１ ６２ １１ ５６ １６ ９７ ３４ ４２ ７ ２８
３８０ １ ２０ ０ ７４
７ １３
４２０ １ １４ ０ ７１
７ ２７
４００ １ ２１ ０ ７３
Fe７３５Cu１Nb３S i １５ ５B ７
Hc/ ( Am－１)
４５０ １ ０８ ０ ６７ ５８０ １ １７ ０ ０１
６ ７６ １１ ２２ ２９ ６６
No t e:Ta—Anne a l i ngt empe r a t ur e;B４０００— Magne t i ci nduc t i on i n t ens i t a sur eda tamagne t i cf i e l do f４０００A/m． yme
nanoc r t a l l i nea l l oyswa spe r i cu l a rt ot her i b Ｇ ys pend bonax i sandgene r a t edt hes l opedhys t e r e s i sl oopso f co r e s．Fr om F i ６,t hea lmos ts t r a i thys t e r e s i s g gh l oopsdemons t r a t et het i nyKui nduc edbys t r e s san Ｇ ne a l i ngf o ramo r i３８B１４Ｇ phousFe６２－x Ni１９ CoxCu０１S Cr１１ ( x ＝１,５)a l l oys,andi nd i r e c t l r o he y p vet r obab l i t i ves a t ur a t i on magne t os t r i c t i on con Ｇ p y pos s t an to ft heamo r i３８B１４Ｇ phousFe６２－x Ni１９CoxCu０１S Cr１１( x＝１,５)pha s e．Mo r eove r,i nt heexpe r imen Ｇ t a lr ange,t heanne a l i ngt empe r a t ur e shadne a r l yno i n f l uenc eonλs． ２ ３ Op t imi z e d DCb i a sp r o e r t i e so fF e６２－x N i oxＧ １９C p Cu０１S i３８B１４Cr１１ amo r sa l l o s phou y Byt heaboveexpe r imen t a lr e su l t s,Fe６２－x Ni１９Ｇ ( , , ) CoxCu０１S i３８B１４Cr１１ x ＝０ ５ １０ r i bbonsa f t e r t he rmomagne t i ct r e a tmen tob t a i ned p r e f e r ab l e DC
I s sue２ Amo r CoCuS i BCrAl l oy swi t hSupe r i o rDi r e c tCu r r en tTo l e r an tCha r a c t e r i s t i c s phousFeNi
t o l e r an tpr ope r t i e s,andt he mo s top t imi z edp r ope r Ｇ t i e sa r eob t a i nedwhent heCoc on t en twa s１０a t ％． F i ７g i ve st he DC hys t e r e s i sl oopso fFe６２－x Ni１９Ｇ g ( , ) CoxCu０１S i３８B１４Cr１１ x＝５ １０ amo r l l oys． phousa Comme r c i a lFe Ｇ ba s ednano c r t a l l i nec o r e swe r ea l so ys i v e nf o rc o m a r i s o n． T h ea m o r h o u sa l l o sa t x ＝ g p p y , １０exh i b i t edsupe r i o rDCr e s i s t an tp r ope r t i e si e , f１１００ A/m,c ompa r ed wi t h an i so t r opyf i e l d Ha o t hos eo f６００and８００A/mf o rFe Ｇ ba s ednano c r s t a l y Ｇ , , l i nea l l oya tx＝５ r e spe c t i ve l Cons equen t l i Ｇ y． y add t i ono fad e f i n e damoun to fCoi n t oFeNi CuS i BCramo r Ｇ sa l l oysc ou l dp r ov i deapo t en t i a lapp l i c a t i oni n phou DCt o l e r an tcu r r en tt r ans f o rme rc o r e s．
１４９
momagne t i ct r e a tme n twe r eimp r ov e dwi t hi nc r e a s i ng t heCocont entandwe r esupe r i o rt ot hos eo fFe７３５Ｇ Cu１Nb３S i１５５B７ andFe６６Ni１０Cu１Nb３S i１１B９ nanoc r Ｇ ys t a l l i nea l l oys． ( ２)Theve r t i c a lhys t e r e s i sl oopso fFe６２－xNi１９Ｇ CoxCu０１S i３８B１４Cr１１ ( x ＝１,５)a l l oysa f t e rs t r e s s anne a l i nggaveev i denc eo ft hep r obab l i t i ves a t Ｇ ypos ur a t i onmagne t os t r i c t i ono ft heamo r l l oys． phousa ( ３)Comp a r e d wi t hc omme r c i a lFe Ｇb a s e dn ano Ｇ c r s t a l l i n ea l l oysus edi ncur r en tt r ans f o rme r sco r e s, y DCt o l e r an tp r ope r t i e so fFe６２－xNi１９CoxCu０１S i３８B１４Ｇ Cr１１amo r l l oyswe r ep r omo t edwi t hcons t an t phousa r e l a t i vepe rme ab i l i t r ovedan i so t r opyf i e l d． yandimp ( ４)Theadd i t i ono fNii nt heF i neme t Ｇ t l Ｇ ypea l oysl e adst ot he magne t i can i so t r opycons t an ten Ｇ l a r i chr e su l t edi nt hel i ne a rhys t e r e s i sl oops ged,wh o fr i bbons． Re f e r enc e s:
Thea r r owi nd i c a t e st hede f i n i t i ono ft hean i s o t r opyf i e l d Ha．
F i ７ DChy s t e r e s i sl o op so fc o r e swoundf r omr i bbon so f g c omme r c i a lFe Ｇ ba s e dnano c r s t a l l i n ea l l o sandamo rphou s y y a l l o sFe６２－xNi１９CoxCu０１S i３８B１４Cr１１ ( x＝５,１０) y
３ Conc l u s i on s ( １)TheCoadd i t i onhadane f f e c tonmagne t i c r o e r t i e so f a m o r h o u sa l l o s ． T h er e l a t i v e e r m e Ｇ p p p y p ab i l i t c r e a s edwi t ht hei nc r e a s eo fCoc on t en tand yde t heva r i a t i ono fc oe r c i vef o r c eo ft hea l l oysduet ot he magne t i can i s o t r opyi nduc edi nt h e Fe６２－x Ni C o １９ xＧ ( , , ) Cu０１S i３８B１４Cr１１ x＝０ ５ １０ amo r l l oysby phousa t he rmomagne t i ct r e a tmen t．TheDCt o l e r anc epr op Ｇ e r t i e so ft heamorphousr i bbonssub e c t edt othe r Ｇ j
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