Abstract
Novel microwave absorption and dispersion measurements have been performed on polycrystalline samples and well-characterized single-crystal platelets of high-Tc superconductors YBa₂Cu₃O₇₋ₓ. The results are explained in terms of fluxoids and rapid variation of the penetration depth near and below Tc. The microwave absorption increases as a function of the magnetic field as a result of increase in the surface area of the normal-conducting region. By applying a modulating field in a particular manner and from thermodynamic considerations there are strong indications of energy absorption by fluxoids.
Keywords
fluxoids, microwave absorption, YBa₂Cu₃O₇₋ₓ, Tc, low field dependence, dispersion measurements, polycrystalline samples, single crystal platelets, energy absorption, modulating fields
Subject Categories
Superconductors, Magnetic fields
Disciplines
Electromagnetics and photonics
Publisher
American Physical Society
Publication Date
1-1-1989
Rights Information
Copyright 1989 American Physical Society
Rights Holder
American Physical Society
Permanent URL
Recommended Citation
Karim, R.; Oliver, S. A.; Vittoria, C.; Widom, A.; Balestrino, G.; Barbanera, S.; and Paroli, P., "Low-field dependence of the microwave-absorption in superconducting YBa₂Cu₃O₇₋ₓ near Tc" (1989). Electrical and Computer Engineering Faculty Publications. Paper 67. http://hdl.handle.net/2047/d20002238
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Notes
Originally published in Physical Review B 39, 797-800 (1989). doi 10.1103/PhysRevB39.797 (http://link.aps.org/doi/10.1103/PhysRevB39.797).