Raman scattering investigation on YbPd
Raman scattering investigation on YbPd
复制标题
YbPd 的拉曼散射研究
DOI：
10.1143/jpsjs.80sa.sa095
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
T.Hasegawa;N.Ogita;et al.
在4~300 K的温度范围内测量了YbPd单晶的拉曼光谱。在此温度范围内，YbPd在T1= 132 K和T2= 110 K处经历了两次跃迁。在4 K处，观察到两个新峰，并且在120 K处发现了91 cm-1处的峰P2。该结果表明低于T1的结构畸变。 P2 的能量和线宽在 120 K 以下进行了检查。其能量在 90 K 左右显示最小值，并随着温度的升高而增加，直至 T2。 90 K 以下的异常能量变化可以通过体积变化的温度依赖性来解释。 T2 周围能量的急剧变化是由于 T2 处的一阶跃迁引起的结构变化。在 20 K 以下也观察到线宽的异常增加。
Raman spectra of the single crystal of YbPd have been measured in the temperature range from 4 to 300 K. In this temperature range, YbPd undergoes two transitions atT1= 132 K andT2= 110 K. At 4 K, two new peaks have been observed, and the peak P2 at 91 cm-1have been found up to 120 K. This result indicates the structural distortion belowT1. 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 toT2. The anomalous energy change below 90 K can be explained by the temperature dependence of the volume change. The steep change of the energy aroundT2is due to the structural change through the first order transition atT2. The anomalous increase of the linewidth has been also observed below 20 K.