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Measurement of magnetostriction and anisotropy of Mg-ferrite
Solid State Communications,
Vol. 11, pp. iii—xi, 1972.
Pergamon Press.
Printed in Great Britain
Abstracts of Articles to be Published in The Journal of Physics and Chemistry of Solids ‘J Phys. Chem. Solids (to be published)’ should be cited in references to material quoted from this section prior to the publication of the relevant article. 1.
SOLID SOLUTIONS OF HYDROGEN IN GOLD, SILVER, AND COPPER
Photoluminescence measurements at 77°K on solution grown and heat treated GaAs speci-
Rex B. McLellan, Department of Mechanical and Aerospace Engineering and Materials Science, William Marsh Rice University, Houston, Texas 77001 U.S.A.
mens are shown to exhibit a luminescent band near 8900A. This band is suggested to be related with arsenic vacancies. Received 9 June 1972
The temperature variation of the hydrogen solubility of copper, silver, and gold in equilibrium with H 2-gas at atmospheric pressure has been measured. Values for the relative partial enthalpy and partial excess entropy of the interstitially dissolved hydrogen atoms have been estimated from the solubility data.
3.
The experimental data are compared with those of previous investigations. The partial entropy values obtained for copper and silver show a ‘regular’ behavior when compared with partial entropies for other cubic metals having a small occludive capacity for hydrogen. The gold—hydrogen system is, however, anomalous and has a partial excess entropy which is essentially zero.
and the anisotropy constant K1 of Mg-ferrites [Mgi~ Fe1 -~}[Mg_~Fe1+.,7]O4, (77 — 0.101, 0.154, 0.184, 0.219) at room temperature, liquid N2 temperature and liquid He temperature were observed by ferrimagnetic resonance techniques at 9.5GHz.
K.I. Arai and N. Tsuya, Research .
Institute of Electrical Communication, Tohoku University, Sendai, Japan. The magnetostriction constants A100 and A~
The signs of the magnetostriction constants A1~and A~ are always negative and positive, respectively and the magnitudes of these constants increase with decreasing temperature. These constants ~ and A111 at liquid He temperature are found to be —14.4 x 10~ and 2.4 x 10~ respectively, when ~ is 0.101, and then the magnitudes of those constants decrease linearly with increasing 77.
Received 31 May 1972
2.
MEASUREMENT OF MAGNETOSTRICTION AND ANISOTROPY OF Mg-FERRITE
LUMINESCENCE OF ARSENIC VACANCYRELATED DEFECTS IN GaAs R. Romano-Moran and K.L. Ashley, Electronic Sciences Center, Southern Methodist University, Dallas, Texas 75222.
Received 13 March 1972 Revised 12 June 1972
iii
Vol. 11, pp. iii—xi, 1972.
Pergamon Press.
Printed in Great Britain
Abstracts of Articles to be Published in The Journal of Physics and Chemistry of Solids ‘J Phys. Chem. Solids (to be published)’ should be cited in references to material quoted from this section prior to the publication of the relevant article. 1.
SOLID SOLUTIONS OF HYDROGEN IN GOLD, SILVER, AND COPPER
Photoluminescence measurements at 77°K on solution grown and heat treated GaAs speci-
Rex B. McLellan, Department of Mechanical and Aerospace Engineering and Materials Science, William Marsh Rice University, Houston, Texas 77001 U.S.A.
mens are shown to exhibit a luminescent band near 8900A. This band is suggested to be related with arsenic vacancies. Received 9 June 1972
The temperature variation of the hydrogen solubility of copper, silver, and gold in equilibrium with H 2-gas at atmospheric pressure has been measured. Values for the relative partial enthalpy and partial excess entropy of the interstitially dissolved hydrogen atoms have been estimated from the solubility data.
3.
The experimental data are compared with those of previous investigations. The partial entropy values obtained for copper and silver show a ‘regular’ behavior when compared with partial entropies for other cubic metals having a small occludive capacity for hydrogen. The gold—hydrogen system is, however, anomalous and has a partial excess entropy which is essentially zero.
and the anisotropy constant K1 of Mg-ferrites [Mgi~ Fe1 -~}[Mg_~Fe1+.,7]O4, (77 — 0.101, 0.154, 0.184, 0.219) at room temperature, liquid N2 temperature and liquid He temperature were observed by ferrimagnetic resonance techniques at 9.5GHz.
K.I. Arai and N. Tsuya, Research .
Institute of Electrical Communication, Tohoku University, Sendai, Japan. The magnetostriction constants A100 and A~
The signs of the magnetostriction constants A1~and A~ are always negative and positive, respectively and the magnitudes of these constants increase with decreasing temperature. These constants ~ and A111 at liquid He temperature are found to be —14.4 x 10~ and 2.4 x 10~ respectively, when ~ is 0.101, and then the magnitudes of those constants decrease linearly with increasing 77.
Received 31 May 1972
2.
MEASUREMENT OF MAGNETOSTRICTION AND ANISOTROPY OF Mg-FERRITE
LUMINESCENCE OF ARSENIC VACANCYRELATED DEFECTS IN GaAs R. Romano-Moran and K.L. Ashley, Electronic Sciences Center, Southern Methodist University, Dallas, Texas 75222.
Received 13 March 1972 Revised 12 June 1972
iii