Anomalous Magnetic Phase Diagram of CeTe under High Pressure

作者：Takaguchi Hiroaki^*; Hayashi Yuya; Matsumura Takeshi; Umeo Kazunori; Sera Masafumi; Ochiai Akira

来源：Journal of the Physical Society of Japan, 2015, 84(4): 044708.

DOI：10.7566/JPSJ.84.044708

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 [100], [110], and [111]. 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 Gamma(7) crystal-field ground state and the Gamma(8) excited state.

• 出版日期2015-4-15