Low frequency resistance fluctuations in films of high temperature superconductors

Author

Rosenthal, P. ; Hammond, R.H. ; Beasley, M.R. ; Leoni, R. ; Lerch, Ph ; Clarke, J.

Author_Institution

Dept. of Appl. Phys., Stanford Univ., CA, USA

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

973

Lastpage

975

Abstract

Low-frequency voltage fluctuations in thin films of YBa₂Cu₃O_7-x at and above the superconducting transition temperature have a spectral density proportional to the ratio of the average voltage across the film to the frequency. The ratio of the spectral density to the average voltage decreases markedly as the microstructure of the films is improved. In contrast to classic superconductors, the noise at the resistive transition does not arise from equilibrium temperature fluctuations

Keywords

barium compounds; high-temperature superconductors; superconducting thin films; yttrium compounds; YBa₂Cu₃O_7-x; average voltage; high temperature superconductor; low-frequency resistance fluctuations; resistive transition; spectral density; superconducting transition temperature; voltage fluctuations; Fluctuations; Frequency; High temperature superconductors; Low-frequency noise; Magnetic noise; SQUIDs; Superconducting device noise; Superconducting films; Superconducting materials; Superconducting transition temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92451

Filename

92451