Quadrupole effects in tetragonal crystals PrCuSi and DyCuSi

三本 啓輔*; 後藤 沙織*; 根本 祐一*; 赤津 光洋*; 後藤 輝孝*; Dung, N. D.*; 松田 達磨; 芳賀 芳範; 竹内 徹也*; 杉山 清寛*; et al.

Journal of Physics; Condensed Matter, 25(29), p.296002_1 - 296002_8, 2013/07

https://doi.org/10.1088/0953-8984/25/29/296002

We have investigated quadrupole effects in tetragonal crystals of PrCuSi and DyCuSi by means of low-temperature ultrasonic measurements. The elastic constant C of PrCuSi exhibits pronounced softening below 70 K, which is described in terms of a quadrupole susceptibility for a doublet ground state.