Microwave absorption by vortex cores in the high-temperature superconductor YBa2Cu3O7−x

F. J. Owens

doi:10.1103/PhysRevB.43.8631

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Microwave absorption by vortex cores in the high-temperature superconductor YBa2Cu3O7−x

F. J. Owens

DOI 10.1103/PhysRevB.43.8631 · Physical Review B

T1

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Abstract

Direct absorption measurements of microwave energy having energy less than the superconducting gap in the granular composites of the 90-K superconductor YBa2Cu3O1−x as a function of dc magnetic-field strength between 0.1 and 1.0 T reveal a nonlinearly increasing absorption of microwave energy with increasing field strength. The absorption can be detected in regions of the T-H phase diagram in which thermally activated flux flow does not occur. The temperature and field dependences of the absorption are different from those for low-magnetic-field absorption (H<0.06 T) and are shown to be consistent with the behavior expected by the absorption of microwave energy by normal carriers at the cores of vortices in type-II superconducting materials.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown