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Field emission fluctuation phenomena of potassium microcrystals on tungsten
Al75 Surface Science North-Holland
127 (1983) 487-497
487
publishingCompany
FIELD EMISSION FLUCTUATION PHENOMENA MI@ROCRYSTALS ON TUNGSTEN I. f$ectral density functions and flip-flop
OF POTASSIUM
T. BlIERNAT Institbte of Experimental
Physics, University of Wrocfaw, Cybulskiego 36, 50 - 205 Wroclaw, Poland
Ch. KLEINT Department Dem. Rep.
of Physics, Karl-Marx
-University,
Leipzig, Linn&rasse
5, DDR -701 Leipzig,
German
and R. @CLEWSKI Institwte of Experimental Received
21 April
Physics, Uniuersity of Wrocfaw, Cybulskiego 36. 50- 205 Wroctaw, Poland
1981; accepted
for publication
17 January
1983
The field emission flicker noise technique has been applied to study dynamical properties epitaxial potassium microcrystals on tungsten. Spectral density functions of the (111) region temperatures between 78 and about 230 K were obtained. Some preliminary observations flip-flop behaviour of potassium crystals are presented and discussed.
498
of for of
Surface Science 127 (1983) 498-512 North-Holland Publishing Company
FIE+D EMISSION FLUCTUATION PHENOMENA OF POTASSIUM MIC;ROCRYSTALS ON TUNGSTEN II. ‘I!emperature dependence and simulation of noise properties T. BIERNAT Institute of Experimental
Physics, University of Wroclaw, Cybulskiego 36, 50 - 205 Wroclaw, Poland
and Ch. KLEINT Department Dem. Rep. Received
of Physics, Karl-Marx
15 October
1982; accepted
-University,Leipzig. LinnPstrasse 5, DDR - 701 Leipzig for publication
17 January
German
1983
The temperature dependence of the flicker noise of potassium microcrystals investigated in Part 1 is described in terms of spectral densities, exponents of spectral density functions, knee frequencies, and noise activation energies. The results of a simulation procedure of the spectral properties and their temperature dependence by different Lorentzian functions are presented and disc&d together with some autocorrelation functions obtained by Wiener-Khintchine transformatian of the simulated spectra. The observed noise is thought to be due to fluctuations in shape of the crystal in the built-up state, changes in cluster size and premelting phenomena.
127 (1983) 487-497
487
publishingCompany
FIELD EMISSION FLUCTUATION PHENOMENA MI@ROCRYSTALS ON TUNGSTEN I. f$ectral density functions and flip-flop
OF POTASSIUM
T. BlIERNAT Institbte of Experimental
Physics, University of Wrocfaw, Cybulskiego 36, 50 - 205 Wroclaw, Poland
Ch. KLEINT Department Dem. Rep.
of Physics, Karl-Marx
-University,
Leipzig, Linn&rasse
5, DDR -701 Leipzig,
German
and R. @CLEWSKI Institwte of Experimental Received
21 April
Physics, Uniuersity of Wrocfaw, Cybulskiego 36. 50- 205 Wroctaw, Poland
1981; accepted
for publication
17 January
1983
The field emission flicker noise technique has been applied to study dynamical properties epitaxial potassium microcrystals on tungsten. Spectral density functions of the (111) region temperatures between 78 and about 230 K were obtained. Some preliminary observations flip-flop behaviour of potassium crystals are presented and discussed.
498
of for of
Surface Science 127 (1983) 498-512 North-Holland Publishing Company
FIE+D EMISSION FLUCTUATION PHENOMENA OF POTASSIUM MIC;ROCRYSTALS ON TUNGSTEN II. ‘I!emperature dependence and simulation of noise properties T. BIERNAT Institute of Experimental
Physics, University of Wroclaw, Cybulskiego 36, 50 - 205 Wroclaw, Poland
and Ch. KLEINT Department Dem. Rep. Received
of Physics, Karl-Marx
15 October
1982; accepted
-University,Leipzig. LinnPstrasse 5, DDR - 701 Leipzig for publication
17 January
German
1983
The temperature dependence of the flicker noise of potassium microcrystals investigated in Part 1 is described in terms of spectral densities, exponents of spectral density functions, knee frequencies, and noise activation energies. The results of a simulation procedure of the spectral properties and their temperature dependence by different Lorentzian functions are presented and disc&d together with some autocorrelation functions obtained by Wiener-Khintchine transformatian of the simulated spectra. The observed noise is thought to be due to fluctuations in shape of the crystal in the built-up state, changes in cluster size and premelting phenomena.