Title :
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
fDate :
3/1/1989 12:00:00 AM
Abstract :
Low-frequency voltage fluctuations in thin films of YBa2Cu3O7-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; YBa2Cu3O7-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;
Journal_Title :
Magnetics, IEEE Transactions on
