The thermal expansion and temperature dependence of electrical resistivity were measured for EuNi2(Si1-xGex)2, which shows a valence transition against temperature in 0.5≤x≤0.82. A first-order phase transition was observed in the temperature dependence of the lattice parameters of x = 0.79 and 0.82, while the lattice parameters vary continuously with temperature for x≤0.70. The temperature dependence of electrical resistivity shows a peak at the valence transition temperature. The origin of the peak is discussed on the basis of the dynamic alloy model.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)