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 1.1K 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.
Original language | English |
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Pages (from-to) | 735-741 |
Number of pages | 7 |
Journal | journal of the physical society of japan |
Volume | 74 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2005 Feb |
Keywords
- CeLaB
- Dense Kondo effect
- Elastic constant
- Magnetic phase diagram
- Octupolar ordering
- Quadrupolar ordering
- Ultrasonic measurement
ASJC Scopus subject areas
- Physics and Astronomy(all)