Abstract
Abstract Application of pressure on the valence fluctuating compound YbInCu 4 suppresses the valence transition temperature and stabilizes the high-temperature (HT) magnetic phase. We have investigated microscopically the pressure effect on the electronic states of YbInCu 4 with Cu–NQR under up to 1.68 GPa. The effect of pressure appears in the increase of quadrupole frequencies mainly caused by shrinking of the cell volume. Whereas the temperature-independent behavior of spin-lattice relaxation time T 1 in the HT phase and T 1 T =constant metallic behaviour in the LT phase are hardly affected by pressure, indicating that the electronic states in both HT and LT phases are rather insensitive to pressure up to 1.68 GPa.
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