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Continuous Two-Dimensional Melting of Vortex-Solid in High Temperature Superconductors

Published online by Cambridge University Press:  28 February 2011

N.-C. Yeh
N.-C. Yeh*
Affiliation:
Department of Physics, California Institute of Technology Pasadena, CA 91125
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Abstract

A model of continuous two-dimensional melting in the mixed state of high temperature superconductors is proposed. Two-dimensional melting sets in at a cross-over temperature Tx(H) below the three-dimensinal phase transition Tx(H) due to finite size effects, and Tx(H) is a function of the sample thickness (lc), applied magnetic field (H), and k(= λ/ξ) For a given zero-field transition temperature Tc0 and material properties, (such as defect density), the onset temperature of 2D-melting (Tx(H)) decreases with decreasing sample thickness and increasing magnetic field. In transport studies, thermally induced melting is further complicated by the depinning effect of high current densities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 23
Copyright
Copyright © Materials Research Society 1990

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References

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