Magnetic and superconducting properties of CeRhGe2 and CePtSi2

Yusuke Hirose, Naoto Nishimura, Fuminori Honda, Kiyohiro Sugiyama, Masayuki Hagiwara, Koichi Kindo, Tetsuya Takeuchi, Etsuji Yamamoto, Yoshinori Haga, Masato Matsuura, Kazuma Hirota, Akira Yasui, Hiroshi Yamagami, Rikio Settai, Yoshichika Onuki

研究成果: ジャーナルへの寄稿学術誌査読

9 被引用数 (Scopus)


We synthesized a new compound of CeRhGe2 with the orthorhombic CeNiSi2-type structure. By measuring the electrical resistivity, magnetic susceptibility, magnetization, specific heat, and neutron scattering for single crystals, CeRhGe2 was found to order antiferromagnetically below TN = 7.6 K with an ordered moment of 1.3 μB/Ce oriented along the magnetic easy-axis of the c-axis. Similar measurements were also carried out for CePtSi2 single crystals. From the experimental results of anisotropic magnetic susceptibility and magnetization, the crystalline electric field (CEF) scheme was obtained for CeRhGe2 and CePtSi2, together with the similar compound CeNiGe2. Furthermore, we carried out pressure experiments by measuring the electrical resistivity of CePtSi2 and CeRhGe2. In the quantum critical region where the Néel temperature becomes zero, we observed superconductivity in CePtSi2 and most likely CeRhGe2, at 1.5 and 7.1 GPa, respectively. The upper critical field of CePtSi2 was found to be highly anisotropic with respect to the three principal field directions.

ジャーナルjournal of the physical society of japan
出版ステータス出版済み - 2月 2011

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)


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