Electronic properties of K3C60 studied by 13C nuclear-magnetic-resonance spectra

Susumu Sasaki*, Azusa Matsuda, C. W. Chu

*この研究の対応する著者

研究成果: Article査読

8 被引用数 (Scopus)

抄録

13C nuclear-magnetic-resonance (NMR) spectra are obtained to investigate the electronic properties of a superconducting fulleride K3C60. Asymmetric line shapes below 235 K are reproduced by the powder patterns of anisotropic NMR frequency shifts (K1) of electronic single-site. The temperature (T) dependence of K1 indicates that the 13C hyperfine coupling (Aspin) has both an isotropic part (Aisospin) and an anisotropic part (Aaxspin) with Aisospin/Aaxspin = 0.78. Substantial decrease in the spin susceptibility (i.e. Xspin(Tc)/Xspin(300K) = 0.55) is not explained by the lattice contraction alone. The Knight shift values can be deduced experimentally without assuming the chemical shift values, since our analysis shows that the line shapes below Tc are affected negligibly by the magnetic-field distribution, which is consistent with the large penetration depth. We also showed the validity and consistency of our analysis.

本文言語English
ページ(範囲)223-237
ページ数15
ジャーナルPhysica C: Superconductivity and its applications
278
3-4
DOI
出版ステータスPublished - 1997 5 1
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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