UNSPECIFIED (1994) FLUX-PINNING AND THE IRREVERSIBILITY LINE IN BI2SR2CACU2O8 SINGLE-CRYSTALS. In: 20th International Conference on Low Temperature Physics, AUG 04-11, 1993, EUGENE, OR.

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Abstract

Measurements of the ac-susceptibility have been used to investigate the irreversibility line (IL) for a Bi2Sr2CaCu2O8 Single crystal. The activation energy, U0, determined from the frequency dependence of the ac-susceptibility, can be related to the IL if one employs the model of thermally activated flux creep. This correlation is clearly demonstrated by the observation of a kink in the IL and the existence of two regions in the U0(H) curve. These results show that for the magnetic field strengths considered in this work, the IL is a depinning line marking a crossover from flux creep to flux flow regimes.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICA B
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0921-4526
Date:	February 1994
Volume:	194
Number:	Part 2
Number of Pages:	2
Page Range:	pp. 1887-1888
Publication Status:	Published
Title of Event:	20th International Conference on Low Temperature Physics
Location of Event:	EUGENE, OR
Date(s) of Event:	AUG 04-11, 1993
URI:	http://wrap.warwick.ac.uk/id/eprint/20337

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