Field-induced microwave absorption in high- T sub c superconducting powders: Evidence for a superconducting glass phase at low T (original) (raw)

Journal of Applied Physics, 1990

Abstract

Measurements of the magnetic-field-induced microwave absorption, {ital P}({ital H}), in micron-sized powders of the high-temperature superconductor YâBaâCuâOâ at several microwave frequencies for 1.3 Kâ¤{ital T}â¤{ital T}{sub {ital c}} are reported. The hysteresis loops ({ital P}({ital H}) vs {ital H}) observed at low temperatures ({ital T}â¤16 K) indicate the presence of spontaneous circulating currents within the sample. These hysteresis loops and

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