Anisotropic Phase Diagram for Quadrupole Ordering and Possible Crystal Field Level Structure in TmTe(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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The origin of an anisotropic phase diagram for the antiferro-quadrupolar (AFQ) order in TmTe is studied using a realistic J=7/2 multiplet model, based on a previous analysis for the classical limit J→∞. Assuming the Γ_3-type AFQ order parameters, a quantitative comparison of the phase diagram with the experiments is presented for a few candidates of the crystal field (CF) level schemes. It is shown that a scheme with a sequence from low- to high-energy levels, Γ_8-Γ_6-Γ_7, naturally explains the observed field dependence and anisotropy of the phase diagram. The resonant x-ray scattering signals in the AFQ phase are studied to explore a possibility of identifying the order parameter and the CF scheme experimentally.
- 社団法人日本物理学会の論文
- 2008-12-15
著者
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NAGAO Tatsuya
Faculty of Engineering, Gunma University
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椎名 亮輔
Department Of Physics Tokyo Metropolitan University
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SHIINA Ryousuke
Department of Physics, Tokyo Metropolitan University
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Shiina Ryousuke
Department Of Physics Tokyo Metropolitan University
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Nagao Tatsuya
Gunma Univ. Gunma Jpn
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Nagao Tatsuya
Faculty Of Engineering Gunma University
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Shiina Ryousuke
Department Of Physics Faculty Of Science Science University Of Tokyo
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Shiina Ryousuke
Department of Materials Science and Technology, Niigata University, Niigata 950-2181, Japan
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