39K-NMR observation of temperature-dependent spin susceptibility in K3C60

Susumu Sasaki, Azusa Matsuda, C. W. Chu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

39K-NMR spectra of superconducting fulleride K3C60 are obtained in the normal state. The 39K-NMR shifts of two symmetrical lines observed with no quadrupolar-split satellites, that are assigned to the potassium tetrahedral- and octahedral-sites, are found to show the same temperature (T) dependence as the 13C-NMR shifts. From roughly estimated spin-lattice relaxation time, it is found that the conduction-electron density at the potassium site is nearly the same as that at the carbon site. These confirm that the uniform Pauli spin susceptibility, whose T dependence is considered to come from the predicted band effect, causes the reductions of both the 13C- and 39K-NMR shifts with decreasing T. Two experimental facts are pointed out for the T′ site observed.

Original languageEnglish
Pages (from-to)319-324
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume302
Issue number4
DOIs
Publication statusPublished - 1998 Jul 1
Externally publishedYes

Keywords

  • Band effect
  • Conduction-electron density
  • KC
  • KNMR
  • NMR shifts
  • Pauli spin susceptibility
  • T′ site

ASJC Scopus subject areas

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

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