Phenomenological model of the non linear microwave response of a superconductor containing weak links

Velichko, A. V. and Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 2001. Phenomenological model of the non linear microwave response of a superconductor containing weak links. Physical Review B 63 (9) , 094512. 10.1103/PhysRevB.63.094512

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Abstract

A phenomenological model is proposed which describes the effect of both dc and rf magnetic fields H on the microwave surface impedance, Zs=Rs+jXs, of a superconductor containing weak links. Two types of the weak links are considered; a weak link between two grains, shunted by another grain, and a nonshunted weak link. In both cases, the dependences of Rs and Xs on applied H were found to be anomalous. Under certain conditions, the values of Zs(H) can fall below the zero-field values. Comparison with experiment is performed, and very good qualitative and (in some cases) quantitative agreement is found.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	0163-1829
Last Modified:	15 May 2023 20:26
URI:	https://orca.cardiff.ac.uk/id/eprint/8428

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