Magnetic and superconducting properties of CeRhGe and CePtSi

CeRhSi及びCePtSiの磁性と超伝導

広瀬 雄介*; 西村 尚人*; 本多 史憲*; 杉山 清寛*; 萩原 政幸*; 金道 浩一*; 竹内 徹也*; 山本 悦嗣  ; 芳賀 芳範   ; 松浦 直人*; 廣田 和馬*; 保井 晃; 山上 浩志; 摂待 力生*; 大貫 惇睦

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

Magnetic and superconducting properties of CeRhGe and CePtSI have been investigated by bulk property measurements and neutron scattering experiments. CeRhGe was found to order antiferromagnetically with an ordered moment 1.3 /Ce along the -axis of the orthorhombic unit cell. High pressure resistivity measurements revealed a suppression of the antiferromagnetic transition with increasing pressure and the occurrence of superconductivity near the critical pressure where antiferromagnetism vanishes. Quantum-critical characteristics are expected to these compounds.