Anomalous Magnetic Phase Diagram of CeTe under High Pressure
JPSJ_84-4_044708.pdf 867 KB
We have investigated the anomalous ordered phase of CeTe under high pressure, which has been suggested to be an antiferroquadrupole ordered phase. An anisotropic magnetic phase diagram has been obtained from magnetization and specific heat measurements for the three main field directions along , , and . We discuss the magnetic phase diagram using a two-sublattice mean-field calculation including antiferromagnetic and antiferroquadrupolar interactions. The anomalous ordered phase can be interpreted as an antiferromagnetic ordered phase, which is strongly affected by the antiferroquadrupolar interaction through the off-diagonal matrix element between the Γ7 crystal-field ground state and the Γ8 excited state.
This work was supported by Grants-in-Aid for Scientific Research (Nos. 21204456, 21102515, and 2430087) from JSPS and MEXT.
Journal of the Physical Society of Japan
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The Physical Society of Japan
Copyright (c) 2015 The Physical Society of Japan
Copyright (c) 2015 一般社団法人日本物理学会
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Graduate School of Advanced Sciences of Matter
Natural Science Center for Basic Research and Development