Elastic Properties and Magnetic Phase Diagrams of Dense Kondo Compound Ce_<0.75>La_<0.25>B_6(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

概要

論文の詳細を見る
We have investigated the elastic properties of the cubic dense Kondo compound Ce_<0.75>La_<0.25>B_6 by means of ultrasonic measurements. We have obtained magnetic fields vs temperatures (H-T) phase diagrams under magnetic fields along the crystallographic [001], [110] and [111] axes. An ordered phase IV showing the elastic softening of c_<44> locates in low temperature region between 1.6 and 1.1K below 0.7T in all field directions. The phase IV shows an isotropic nature with regard to the field directions, while the antiferro-magnetic phase III shows an anisotropic character. A remarkable softening of c_<44> and a spontaneous trigonal distortion ε_<yz>+ε_<zx>+ε_<xy> recently reported by Akatsu et al. [J. Phys. Soc. Jpn. 72 (2003) 205] in the phase IV favor a ferro-quadrupole (FQ) moment of O_<yz>+O_<zx>+O_<xy> induced by an octupole ordering.
社団法人日本物理学会の論文
2005-02-15