Spin Correlation in High-Tc Cuprate HgBa2Ca2Cu3O8+δ with Tc=133 K—An Origin of Tc-Enhancement Evidenced by 63Cu-NMR Study

Ko ichi Magishi, Yoshio Kitaoka, Guo qing Zheng, Kunisuke Asayama, Kazuyasu Tokiwa, Akira Iyo, Hideo Imara

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

The Knight shift, the nuclear spin-lattice relaxation rate, 1/T1, and the transverse relaxation rate, 1/T2G, of 63Cu have been separately measured for the square and the pyramidal CuO2 planes in HgBa2Ca2Cu3O8+δ (Hg1223) with the highest transition temperature, Tc= 133 K to date. From the quantitative analysis of 1/T1 and 1/T2G, it is shown that the product of the staggered susceptibility and the characteristic energy of spin fluctuations around a zone boundary, χQΓQ, for the square CuO2 plane site is larger than that for YBa2Cu3O7 (YBCO7), although that for the pyramidal CuO2 plane site is almost the same. This enhancement of χQΓQ for the square site is considered to be responsible for the higher Tc in Hg1223 than in YBCO7.

Original languageEnglish
Pages (from-to)4561-4565
Number of pages5
Journaljournal of the physical society of japan
Volume64
Issue number12
DOIs
Publication statusPublished - Dec 1995
Externally publishedYes

Keywords

  • HgBaCaCuO
  • NMR
  • high-T superconductivity
  • relaxation rate
  • spin correlation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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