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Titolo:
Size effect of 1/f noise in the normal state of YBa2Cu3O7-delta
Autore:
Bei, YJ; Gao, Y; Kang, JF; Lian, GJ; Hu, XD; Xiong, GC; Yan, SS;
Indirizzi:
Beijing Univ, Dept Phys, Beijing 100871, Peoples R China Beijing Univ Beijing Peoples R China 100871 jing 100871, Peoples R China
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 2, volume: 61, anno: 2000,
pagine: 1495 - 1499
SICI:
1098-0121(20000101)61:2<1495:SEO1NI>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONDUCTANCE FLUCTUATIONS; THIN-FILMS; 1-F NOISE; SUPERLATTICES; SUPERCONDUCTORS; TEMPERATURE; MOTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Bei, YJ Beijing Univ, Dept Phys, Beijing 100871, Peoples R China Beijing Univ Beijing Peoples R China 100871 871, Peoples R China
Citazione:
Y.J. Bei et al., "Size effect of 1/f noise in the normal state of YBa2Cu3O7-delta", PHYS REV B, 61(2), 2000, pp. 1495-1499

Abstract

The 1/f noise power spectral density in the normal state of two series of YBa2Cu3O7-delta samples-microbridges of width 4-200 mu m and ultrathin films of thickness 2.4-10.8 nm-are measured at temperatures from 80 to 300 K. Two characteristic lengths-one in the ab plane with a magnitude of about 10(1) mu m and another along the c axis with a magnitude of about 10(0) nm - are discovered. The noise level decreases sharply below the characteristic lengths. Th lowest noise level observed is in the range of that of normal metals. The experimental data can be described reasonably well by the Dutta-Horn thermally activated model. Some possible mechanisms are also discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 01:53:10