Abstract:Nonresonant direct absorption of unmodulated microwaves by both the thallium and yttrium copper oxide superconductors exhibits pronounced temperature-and/or field-history dependence. Zero-fieldcooled samples exhibited an absorption minimum at zero field, and this rninimurn was displaced from zero for field-cooled samples. Rotating the samples relative to the field direction caused the minimum to shift in an approximately cosinusoidal manner.
“…Zero-field-cooled samples exhibit a minimum absorption at zero field; stored flux shifts this minimum in field-cooled samples (Mzoughi et al, 1992).…”
“…Zero-field-cooled samples exhibit a minimum absorption at zero field; stored flux shifts this minimum in field-cooled samples (Mzoughi et al, 1992).…”
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