Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/76649
Type: Artigo de periódico
Title: A POSSIBLE VORTEX-DECOUPLING TRANSITION IN BI2SR2CA2CU3O10
Author: KOPELEVICH, Y
MOEHLECKE, S
MAKAROV, VV
Abstract: Long-time (15-20 h) magnetic-relaxation measurements as a function of temperature are performed in a c-axis oriented bulk Bi2Sr2Ca2Cu3O10 compound sample in a magnetic field of H=1 T applied along the c-axis. It is found that for observation times t greater than or equal to 1 h, M(t) dependences follow the power law M similar to t(-T/Uo), where U-o is the activation energy. A very pronounced peak in the U-o versus T dependence is found at the temperature T-p approximate to 20 K. It is argued that the low-temperature increase of U-0 with temperature is due to thermally induced vortex depinning, while the reduction of U-o above T-p results from a vortex-lattice decoupling phase transition.
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/0921-4534(95)00292-8
Date Issue: 1995
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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