Abstract
The change in electronic structure caused by the transformation from cubic to tetragonal phase has been investigated in near-equiatomic V-Ru and V-M-Ru (M=Ti, Ta) alloys through measurements of electrical resistivity, Hall coefficient and Knight shift of 51V. The absolute values of these properties in a specimen increase with the transformation, which means a decrease in the electronic density of states. The values in all the specimens are universally dependent on the electron-atom ratio Z in both cubic and tetragonal phases. This universal dependence on Z implies the validity of the rigid-band approximation. The increase in Z lowers the values in the cubic phase, while raising them in the tetragonal phase. These results suggest that the transformation is caused by the band Jahn-Teller effect.
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