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Reversible magnetization of Bi2Sr2CaCu2O8 single crystals at 30 K ≤ T < Tc

✍ Scribed by Qiang Li; K. Shibutani; M. Suenaga; I. Shigaki; R. Ogawa

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
162 KB
Volume
194-196
Category
Article
ISSN
0921-4526

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✦ Synopsis

We report magnetization measurements on high-quality Bi2Sr2CaCu2Os single crystals in H//the c-axis. Our reversible magnetization data at 30 K < T < Tc show strong deviations from the linear dependence of M on ln(H) in the intermediate-field region. The Ginzburg-Landau parameter ~, obtained by using the Hao-Clem variational model, was found to vary significantly with the field range for the data fitting. This unusual behavior can not be explained by the thermal fluctuations of the vortices in layered superconductors.

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