Kalisky, B and Shaulov, A and Bhattacharya, D and Tamegai, T and Yeshurun, Y (2004) Vortex order-disorder transition in relaxation and field-sweep measurements. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 408. pp. 382-383. ISSN 0921-4534

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Abstract

Time evolution of the induction profile across a Bi2Sr2CaCu2O8+delta crystal was magneto-optically recorded in two experiments: during ramping the external magnetic field or after a sudden application of the field. The results of these experiments reveal a front-like propagation or retreat of a transient disordered vortex state, respectively. Analysis of the front velocity shows that while the retreat is continuously decelerated, the propagation is accelerated, approaching a constant velocity when the front induction reaches the vortex order-disorder phase transition field B-od. The latter observation suggests a method for determining the value of B-od, eliminating transient state effects. (C) 2004 Elsevier B.V.. All rights reserved.

Item Type:	Article
Additional Information:	7th International Conference on Materials and Mechanisms of Superconductive and High Temperature Superconductors, Rio de Janeiro, BRAZIL, MAY 25-30, 2003
Uncontrolled Keywords:	vortex phase transitions; transient vortex state; annealing time
Subjects:	Microstructure and Characterization
Divisions:	UNSPECIFIED
Depositing User:	Subhra Lahiri
Date Deposited:	25 Jan 2012 10:07
Last Modified:	25 Jan 2012 10:07
URI:	http://cgcri.csircentral.net/id/eprint/501

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