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Noise in the microwave absorption of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
Low-temperature microwave absorption measurements at 9.3 GHz in ceramic YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ were made on the broad modulated signal observed after maximum flux had been trapped. Noise occurred on the extrema of this signal if the modulation frequency and amplitude were sufficiently high and the temperature was close to the lowest that could be attained when the limiting factor was the microwave heating of the sample. The source of the noise is proposed to be thermal instabilities, which produce small flux avalanches in the superconducting grains.
Research Organization:
Department of Physics, Montana State University, Bozeman, Montana 59717
OSTI ID:
6441801
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:4; ISSN PRBMD
Country of Publication:
United States
Language:
English