Title :
Low frequency electrical noise in bulk YBa2Cu3O7
Author :
Hickman, H. ; Chen, T.M. ; Wallace, William J. ; Liu, S.T.
Author_Institution :
South Florida Univ., Tampa, FL, USA
Abstract :
Low-frequency electrical noise measurements of bulk YBa2Cu3O7 are reported for samples that were prepared by oxalate precipitation. The resistance versus temperature curve for these materials flattens into a pronounced `tail´ just before the samples become fully superconducting. 1/f noise appeared high on this resistive tail. The normalized noise level showed a peak right at the top of the tail, then gradually decreased as the temperature was increased towards room temperature. A second peak occurred around 200 K. Noise levels were significantly higher in a 5.07 g/cm3 sample than in a 4.44 g/cm3 sample
Keywords :
barium compounds; electric noise measurement; high-temperature superconductors; yttrium compounds; 1/f noise; 200 K; YBa2Cu3O7; high-temperature superconductor; low-frequency electrical noise; noise measurement; normalized noise level; oxalate precipitation; Conducting materials; Frequency; Low-frequency noise; Noise level; Noise measurement; Superconducting device noise; Superconducting materials; Tail; Temperature; Voltage;
Conference_Titel :
Southeastcon '89. Proceedings. Energy and Information Technologies in the Southeast., IEEE
Conference_Location :
Columbia, SC
DOI :
10.1109/SECON.1989.132571
