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FLUX-PINNING AND THE IRREVERSIBILITY LINE IN BI2SR2CACU2O8 SINGLE-CRYSTALS

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UNSPECIFIED (1994) FLUX-PINNING AND THE IRREVERSIBILITY LINE IN BI2SR2CACU2O8 SINGLE-CRYSTALS. In: 20th International Conference on Low Temperature Physics, EUGENE, OR, AUG 04-11, 1993. Published in: PHYSICA B, 194 (Part 2). pp. 1887-1888. ISSN 0921-4526.

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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
Official Date: February 1994
Dates:
DateEvent
February 1994UNSPECIFIED
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

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