23Na-NMR Study in NaV6O11
作者： Harukazu Kato , Masaki Kato , Kazuyoshi Yoshimura , Koji Kosuge
DOI: 10.1143/JPSJ.70.1404
关键词: Ground state 、 Magnetic susceptibility 、 Condensed matter physics 、 Physics 、 Spin–lattice relaxation 、 Vanadium 、 Ion 、 Geometrical frustration 、 Crystallography 、 Knight shift 、 Frustration
摘要: A mixed valent vanadium compound NaV 6 O 11 shows a magnetic phase transition at T t =245 K. For the microscopic investigation of , 23 Na-NMR measurements from 70 K to 300 were carried out on . The Knight shift, and nuclear spin-lattice relaxation rate, 1/ 1 measured. While above has an almost constant value, below gap-type temperature dependence. This is first direct evidence that d -electrons V(1) ions, which form kagome lattice in exhibit spin-singlet ground state formation seems be closely related frustration effect.
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