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Elastic Properties and Magnetic Phase Diagrams of Dense Kondo Compound Ce0.75La0.25B6

Osamu Suzuki·Shintaro Nakamura·Mitsuhiro Akatsu·Yuichi Nemoto·Terutaka Goto·Satoru Kunii
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Abstract

We have investigated the elastic properties of the cubic dense Kondo compound Ce0.75La0.25B6 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 c44 locates in low temperature region between 1.6 and 1.1 K below 0.7 T 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 c44 and a spontaneous trigonal distortion εyz+εzx+εxy recently reported by Akatsu et al. [J. Phys. Soc. Jpn. 72 (2003) 205] in the phase IV favor a ferro-quadrupole (FQ) moment of Oyz+Ozx+Oxy induced by an octupole ordering.

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Osamu Suzuki, Shintaro Nakamura, Mitsuhiro Akatsu, Yuichi Nemoto, Terutaka Goto, Satoru Kunii. 2006-01-23. Elastic Properties and Magnetic Phase Diagrams of Dense Kondo Compound Ce0.75La0.25B6. https://doi.org/10.1143/jpsj.74.735

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