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Phys. Rev. B 61, 14362 - 14365 (2000)

Metastable vortex states in YBa2Cu3O7-δ crystal

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Y. Radzyner
Department of Physics, Institute of Superconductivity, Bar-Ilan University, 52900 Ramat-Gan, Israel

S. B. Roy
Department of Physics, Institute of Superconductivity, Bar-Ilan University, 52900 Ramat-Gan, Israel
Low Temperature Physics Group, Centre for Advanced Technology, 452013 Indore, India

D. Giller
Department of Physics, Institute of Superconductivity, Bar-Ilan University, 52900 Ramat-Gan, Israel

Y. Wolfus
Department of Physics, Institute of Superconductivity, Bar-Ilan University, 52900 Ramat-Gan, Israel

A. Shaulov
Department of Physics, Institute of Superconductivity, Bar-Ilan University, 52900 Ramat-Gan, Israel

P. Chaddah
Low Temperature Physics Group, Centre for Advanced Technology, 452013 Indore, India

Y. Yeshurun
Department of Physics, Institute of Superconductivity, Bar-Ilan University, 52900 Ramat-Gan, Israel

Received 10 January 2000

Magnetization measurements in an untwinned YBa2Cu3O7-δ crystal reveal a range of temperatures and fields for which the magnetization exhibits unusual history-dependent behavior. This range envelopes the transition line, Bss(T), separating between the vortex quasiordered and disordered phases. The observed history effects indicate that a disordered (quasiordered) vortex state can exist as a metastable state below (above) the Bss(T) line. The fields, defining the phase transition and the borders of the metastability region, are correlated to sharp features in the magnetization loop.


©2000 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.61.14362
DOI: 10.1103/PhysRevB.61.14362
PACS: 74.60.Ge, 74.72.Bk, 64.60.My

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