Raman spectra of the single crystal of YbPd have been measured in the temperature range from 4 K to 300 K. In this temperature range, YbPd undergoes two transitions at T1 = 132 K and T2 = 110 K. At 4 K, two new peaks have been observed, and the peak P2 at 91 cm-1 have been found up to 120 K. This result indicates the structural distortion below T 1. The energy and linewidth of P2 have been examined below 120 K. Its energy shows the minimum around 90 K and increases with increasing temperature up to T2. The anomalous energy change below 90 K can be explained by the temperature dependence of the volume change. The steep change of the energy around T2 is due to the structural change through the first order transition at T2. The anomalous increase of the linewidth has been also observed below 20 K.
All Science Journal Classification (ASJC) codes