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Type: Artigo de periódico
Title: Avalanchelike magnetic relaxation in the peak-effect regime of a Nb-O solid solution
Author: Kopelevich, Y
Moehlecke, S
Abstract: An increase of the pinning of vortices near the upper critical field boundary, the peak effect (PE), is studied in a Nb-O solid solution by means of the magnetization measurements. The PE onset is understood as a disorder-induced transition between a relatively ordered vortex lattice and an entangled vortex state. It is found that a characteristic feature of the vortex state in the PE region is a relaxation occurring via a large size magnetization jump or avalanche. It is also found that the temperature and field-dependent time t(j)(H,T), at which the jump occurs, quasi diverges at the peak field H-p(T).
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.58.2834
Date Issue: 1998
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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