期刊
PHYSICAL REVIEW B
卷 62, 期 2, 页码 R775-R778出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.62.R775
关键词
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C-13, H-1, and K-39-NMR measurements of (NH3)K3C60 unambiguously demonstrated that its magnetic properties are described as a S = 1/2 localized spin system over the entire temperature range (300 K-4.2 K). A possible antiferromagnetic structure that appeared below 45 K is compatible with the orientational order of KNH3 pairs on the octahedral (O) site. The present NMR study strongly suggests that the Mott-Hubbard localization occurs due to the removal of the C-60 t(1u)-orbital degeneracy.
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