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Nonlinear microwave absorption in ceramic superconducting Y-Ba-Cu-O

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
Novel microwave measurements in ceramic YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ reveal that in the superconducting phase the absorption is highly nonlinear in the microwave power. At T = 80 K the surface resistance increases with dc field at a rate of 0.0025 ..cap omega../Oe, and with the microwave rf field at 0.07 ..cap omega../Oe, resulting in an absorption that can be substantial in the absence of an applied dc field.
Research Organization:
Departamento de Fiiaasica, Universidade Federal de Pernambuco, 50739, Recife, Brazil
OSTI ID:
6292814
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:13; ISSN PRBMD
Country of Publication:
United States
Language:
English