Magnetic and Superconducting Properties of CeRhGe2 and CePtSi2

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概要

• 論文の詳細を見る

• 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 T_{\text{N}} = 7.6 K with an ordered moment of 1.3 \mu_{\text{B}}/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.

• 2011-02-15

著者

• SETTAI Rikio

  Graduate School of Science, Osaka University

• KINDO Koichi

  ISSP, University of Tokyo

• Honda Fuminori

  Graduate School Of Science Osaka University

• Matsuura Masato

  Graduate School of Health Sciences, Tokyo Medical and Dental University

• Yamamoto Etsuji

  Advanced Science Research Center Japan Atomic Energy Agency

• Sugiyama Kiyohiro

  Graduate School Of Science Osaka University

• Takeuchi Tetsuya

  Low Temperature Center Osaka University

• Onuki Yoshichika

  Graduate School Of Science Osaka University

• Yamagami Hiroshi

  Synchrotron Radiation Research Center Japan Atomic Energy Agency:department Of Physics Kyoto Sangyo

• Hagiwara Masayuki

  Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University

• Hagiwara Masayuki

  KYOKUGEN, Osaka University, Toyonaka, Osaka 560-0043, Japan

• HAGA Yoshinori

  Advance Science Research Center, Japan Atomic Energy Agency

• Hirose Yusuke

  Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043

• Honda Fuminori

  Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

• Nishimura Naoto

  Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

• Hirota Kazuma

  Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

• Yasui Akira

  Synchrotron Radiation Research Center, Japan Atomic Energy Agency, SPring-8, Sayo, Hyogo 679-5148, Japan

• Kindo Koichi

  ISSP, University of Tokyo, Kashiwa, Chiba 277-8581, Japan

• Kindo Koichi

  ISSP, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581

• Matsuura Masato

  Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

• Yasui Akira

  Synchrotron Radiation Research Center, Japan Atomic Energy Agency, SPring-8, Sayo, Hyogo 679-5148

• Honda Fuminori

  Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

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