Flux pinning associated with fishtail shaped hysteresis cycle in textured YBaCuO. Effect of oxygen content

Magnetic hysteresis cycle up to 5 T and relaxation of the magnetization were studied using a SQUID magnetometer. After a first set of measurements the samples were oxygenated once more time under the same conditions, except for the holding time which was doubled. Superconducting temperature, hystere...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 1994-12, Vol.235, p.2809-2810
Main Authors: Fert, A., Redoulès, J.P., Odier, Ph, Pellerin, N.
Format: Article
Language:English
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Summary:Magnetic hysteresis cycle up to 5 T and relaxation of the magnetization were studied using a SQUID magnetometer. After a first set of measurements the samples were oxygenated once more time under the same conditions, except for the holding time which was doubled. Superconducting temperature, hysteresis cycle and magnetization relaxation were again recorded. When we improve the oxygen content, fish tail shape and the associated peak in the pinning curve tend to disappear. This experimental analyse confirms that oxygen deficient regions are probably the origin of the fish tail effect.
ISSN:0921-4534
1873-2143
DOI:10.1016/0921-4534(94)92625-5