Crossover from elastic to plastic vortex creep across the second magnetization peak of high-temperature superconductors

L. Miu, T. Noji, Y. Koike, E. Cimpoiasu, T. Stein, C. C. Almasan

研究成果: Article査読

31 被引用数 (Scopus)

抄録

We investigated the relaxation of the irreversible magnetization of YBa2Cu3O7-δ, Pb2Sr2Y0.53Ca0.47Cu3 O8, and Bi2Sr2CaCu2O8+δ a single crystals with significant quenched disorder in the region of the second magnetization peak. It was found that for an applied magnetic field between the onset field and the peak field the relevant current-density dependence of the activation energy exhibits a sudden change, which can be interpreted as a crossover from elastic to plastic vortex creep. The evolution of this change with magnetic field illustrates the increase of the collective pinning barrier between the onset field and the peak field. The observed increase of the collective pinning barrier is limited by the plastic barrier at the peak field. This appears to be a general behavior, and may have important consequences on the interpretation of the thermally induced vortex phase transition at high magnetic fields.

本文言語English
ページ(範囲)15172-15176
ページ数5
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
62
22
DOI
出版ステータスPublished - 2000 12月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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