Title :
Electrical noise in YBaCuO superconducting thin-films with differing axes of orientation
Author :
Hall, James J. ; Chen, Tsong-Ming
Author_Institution :
Dept. of Electr. Eng., Univ. of South Florida, Tampa, FL, USA
fDate :
11/1/1994 12:00:00 AM
Abstract :
In this paper we present a comparison of dc and electrical noise characteristics of high-temperature superconductor thin-films with differing preferred axes of orientation. Four thin-film samples were studied, two of c-axis and two of a-axis orientation. All films were YBaCuO superconducting material on SrTiO3 substrates. The R-T, I-V, and electrical noise properties were measured for each of the films and comparisons were made between them. The experimental data was compared with current hypotheses on conduction and crystal structure. Our results show that from the dc and electrical noise measurements that the c-axis films are much better than a-axis films in applications where sensitivity and sharp transition are important factors. These results also show that preliminary results fit a p-noise model for a 2-D normal conductor-superconductor percolation network
Keywords :
barium compounds; electric noise measurement; high-temperature superconductors; percolation; superconducting device noise; superconducting thin films; superconducting transition temperature; yttrium compounds; 2D normal conductor-superconductor percolation network; DC noise characteristics; I-V noise properties; R-T noise properties; SrTiO3; YBaCuO superconducting thin-films; YBaCuO-SrTiO3; a-axis orientation; axes of orientation; c-axis orientation; electrical noise characteristics; high-temperature superconductor thin-films; p-noise model; sharp transition; Current measurement; Electric variables measurement; Noise measurement; Substrates; Superconducting device noise; Superconducting films; Superconducting materials; Superconducting thin films; Superconducting transition temperature; Yttrium barium copper oxide;
Journal_Title :
Electron Devices, IEEE Transactions on
