Relaxation in bulk RBa2Cu3O7-δ superconductors

M. Jirsa, T. Nishizaki, N. Kobayashi, M. Muralidhar, M. Murakami

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The shape of the magnetic hysteresis curve, "MHL," in bulk strongly doped RBa2Cu3O7-δ materials is analyzed and its correlation with relaxation characteristics is verified. It is shown that field and temperature dependencies of logarithmic relaxation rate, Q=d ln J/d ln dB/dt, can be obtained from J(B) and J(T) data (J is the supercurrent density associated with total magnetic moment). In the case of the MHL with two well-distinguished peaks, the two additive contributions to J are correlated with corresponding relaxation characteristics, which are given analytically. Plateau in Q(T) dependence in such materials is shown to originate from scanning the specific shape of MHL at a fixed field. From Q(J) plot pinning energy characteristics at low and intermediate fields are deduced.

Original languageEnglish
Article number024525
Pages (from-to)024525-1-024525-9
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number2
DOIs
Publication statusPublished - 2004 Jul 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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