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Dissipative Effects of Vortex Movements in YBa2Cu3O7 Measured by Magnetothermal Effects

Published online by Cambridge University Press:  28 February 2011

Ch. Simon ,
I. Rosenman ,
L. Legrand  and
G. Collin
Ch. Simon
Affiliation:
Groupe de Physique des Solides, Université Paris 7, Laboratoire 17 associé au Centre National de la Recherche Scientifique, 75251 Paris Cedex 05, France
I. Rosenman
Affiliation:
Groupe de Physique des Solides, Université Paris 7, Laboratoire 17 associé au Centre National de la Recherche Scientifique, 75251 Paris Cedex 05, France
L. Legrand
Affiliation:
Groupe de Physique des Solides, Université Paris 7, Laboratoire 17 associé au Centre National de la Recherche Scientifique, 75251 Paris Cedex 05, France
G. Collin
Affiliation:
Laboratoire de Physique des Solides, Bat 510, Université Paris sud, 91405 Orsay Cedex, France.
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Abstract

We have measured the temperature and the magnetization of singlecrystalline YBaCuO samples in a variable magnetic field under quasi adiabatic conditions. By varying the sweep rate of the field, the thermal link to the bath, the size of the sample, the critical temperature and the sample temperature, we have measured the time dependence of the vortex relaxation (the penetration of the critical state, flux jumps, and the instability regime). This magnetothermal instability controls the value of the effective critical current.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 935
Copyright
Copyright © Materials Research Society 1990

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