Phase Transition and Spin Dynamics in LiVO2

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  • Phase Transition and Spin Dynamics in LiVO<SUB>2</SUB>
  • Phase Transition and Spin Dynamics in L

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The phase transition and the spin dynamics in a triangular lattice compound LiVO2 have been studied through magnetic susceptibility and NMR measurements. It has been found that the quadrupole effect and the anisotropy of the Knight shift of the 51V nuclei are appreciably induced due to the distortion of the local symmetry at the V ions below the nonmagnetic-magnetic transition temperatures which are about 500 K on heating and 440 K on cooling. The electronic state and the spin dynamics of V ions above the transition have been explained by the localized spin model with the spin number S=1. It has also been suggested that the dynamics from the transition to about 140 K may be described by the thermally excited spin whose ground state is possibly spin-singlet due to the trimerization of V3+ ions.

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