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Low-Field Dc Josephson Magnetization of Layered Superconductors

Published online by Cambridge University Press:  26 February 2011

Hsang-Jue Wang  and
Ming-Fong Tai
Hsang-Jue Wang
Affiliation:
Telecommunication Labs., Ministry of Transportation and Communications, P. O. Box 71, Chung-Li, Taiwan 32099, Republic of, China
Ming-Fong Tai
Affiliation:
Telecommunication Labs., Ministry of Transportation and Communications, P. O. Box 71, Chung-Li, Taiwan 32099, Republic of, China
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Abstract

Temperature dependences of DC magnetization with low magnetic applied field (< 160 G) have been studied on layered superconductors. Two-step behavior below Tc are seen in most of the bulk samples, when the field is smaller than a few tens of Gauss. A grain-cluster model which taking both inter- and intragrain regions into consideration as two components of the present system is used to interpret the observed phenomena. The intergranular component is conjectured as coming from Josephson tunneling supercurrent between grains. A two-critical-states model including the surface-critical-state is extracted to outline the transition behavior of the shielding currents. The two-step phenomenon of the “bulk” magnetization is well explained with appropriate selections of the coupling strength and phase for the intergrains and of those critical current densities for the intragrains.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 275: Symposium S – Layered Superconductors: Fabrication, Properties and Applications , 1992 , 323
Copyright
Copyright © Materials Research Society 1992

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References

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