TY - JOUR
T1 - 39K-NMR observation of temperature-dependent spin susceptibility in K3C60
AU - Sasaki, Susumu
AU - Matsuda, Azusa
AU - Chu, C. W.
PY - 1998/7/1
Y1 - 1998/7/1
N2 - 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.
AB - 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.
KW - Band effect
KW - Conduction-electron density
KW - KC
KW - KNMR
KW - NMR shifts
KW - Pauli spin susceptibility
KW - T′ site
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U2 - 10.1016/S0921-4534(98)00225-1
DO - 10.1016/S0921-4534(98)00225-1
M3 - Article
AN - SCOPUS:0346276479
VL - 302
SP - 319
EP - 324
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 4
ER -