Magnetic field induced phenomena in UIrGe in fields applied along the axis

UIrGeにおける軸方向の磁場が誘起する現象

Pospil, J.*; 芳賀 芳範   ; 小濱 芳允*; 三宅 厚志*; 神戸 振作  ; 立岩 尚之   ; Valika, M.*; Proschek, P.*; Prokleka, J.*; Sechovsk, V.*; 徳永 将史*; 金道 浩一*; 松尾 晶*; 山本 悦嗣  

Pospil, J.*; Haga, Yoshinori; Kohama, Yoshimitsu*; Miyake, Atsushi*; Kambe, Shinsaku; Tateiwa, Naoyuki; Valika, M.*; Proschek, P.*; Prokleka, J.*; Sechovsk, V.*; Tokunaga, Masashi*; Kindo, Koichi*; Matsuo, Akira*; Yamamoto, Etsuji

The metamagnetic transition between the antiferromagnetic and paramagnetic state in UIrGe has been studied at various temperatures by magnetization, heat capacity, and magnetocaloric effect measurements on a single crystal in static and pulsed magnetic fields applied along the orthorhombic axis. The first-order transition is accompanied by a dramatic increase of the Sommerfeld coefficient. A tentative scenario explaining these anomalies by antiferromagnetic correlations or short-range order in the paramagnetic state is discussed.