Octupole Ordering Model for the Phase IV of Ce_xLa_<1-x>B_6(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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An octupole ordering model is studied by the mean field theory, and its relevance to the phase IV of Ce_xLa_<1-x>B_6 is discussed. The observed lattice distortion along the [III] direction is interpreted in terms of the Γ_<5g>-type /trra-quadrupole moment induced by an antiferro-octupole ordering with Γ_<5u> symmetry. The octupole model also accounts for the cusp in the magnetization as in the Neel transition, and the softening of the elastic constant C_<44> below the ordering temperature. However, the internal magnetic field due to the octupole moment is smaller than the observed one by an order of magnitude. Also discussed is the possibility of a pressure induced antiferromagnetic moment in the octupole-ordered state.
- 社団法人日本物理学会の論文
- 2004-01-15
著者
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Kuramoto Yoshio
Department Of Applied Physics Faculty Of Engineering Tohoku University
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KUBO Katsunori
Department of Physics, University of Tsukuba
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Kubo Katsunori
Department Of Physics Tohoku University
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