Magnetic anisotropy and spin-glass behavior in single crystalline UPdSi

UPdSi単結晶の磁気異方性とスピングラス状態

Li, D. X.*; 木村 昭裕*; 芳賀 芳範   ; 二森 茂樹*; 四竈 樹男*

Li, D. X.*; Kimura, Akihiro*; Haga, Yoshinori; Nimori, Shigeki*; Shikama, Tatsuo*

We present the magnetic and transport properties of single crystalline UPdSi measured with the magnetic field applied along two typical crystallographic directions. For both directions, a spin-glass state is confirmed to form at low temperature with the same spin freezing temperature 11.5 K, initial frequency shift 0.023 and activation energy 90.15 K in zero field. Strong anisotropy in magnetic and transport behavior is found to be a significant feature of UPdSi. The usual ferromagnetic-like anomaly in ac susceptibility and dc magnetization curves around 71 K is observed for .