Elastic anomalies in HoNi2B2C single crystals

[摘要] We have measured temperature and magnetic field dependencies of the sound velocities and the sound attenuation in HoNi2B2C single crystals. The main result is a huge softening of the velocity of C-66 mode due to a cooperative Jahn-Teller effect, resulting in a tetragonal-orthorhombic structural phase transition. Anomalies in the behavior of the C-66 mode through various magnetic phase transitions permit us to revise the low temperature H-T phase diagrams of this compound.

[发布日期] 2004-12-01

[关键词] YNI2B2C