Relaxation in bulk RBa2Cu3O7-δ superconductors

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

Research output: Contribution to journalArticle

14 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
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number2
DOIs
Publication statusPublished - 2004 Jul
Externally publishedYes

Fingerprint

Superconducting materials
Magnetic hysteresis
Magnetic moments
Scanning
plateaus
magnetic moments
plots
hysteresis
scanning
curves
Temperature
temperature
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Relaxation in bulk RBa2Cu3O7-δ superconductors. / Jirsa, M.; Nishizaki, T.; Kobayashi, N.; Miryala, Muralidhar; Murakami, Masato.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 2, 024525, 07.2004.

Research output: Contribution to journalArticle

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