Thermal fluctuation in high-temperature superconductor HgBa2CaCu2O6+δ

Z. J. Huang, Y. Y. Xue, R. L. Meng, X. D. Qiu, Z. D. Hao, C. W. Chu

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15 Citations (Scopus)

Abstract

The reversible magnetization M has been carefully measured on a polycrystalline HgBa2CaCu2O6+δ sample (Hg-1212), with a superconducting transition temperature Tc{reversed tilde}119 K and a transition width ΔT{reversed tilde}2 K. The magnetization is field independent at 116 K, suggesting a significant role of thermal fluctuations. The value of this magnetization leads to an estimated superconducting volume fraction of 65% based on a quasi-2D thermal fluctuation model. After corrections for fluctuation and random grain orientation, the superconducting parameters of κ{reversed tilde}60, Hc2(0) {reversed tilde} 53 T, ξab(0) {reversed tilde} 25 Å, and λab(0) {reversed tilde} 1500 Å are obtained.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume228
Issue number3-4
DOIs
Publication statusPublished - 1994 Jul 20

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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