Magnetic Properties and a Change of the Electrical Resistivity under Pressure in CePtGe_2

概要

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We have succeeded in growing a single crystal of CePtGe_2 with the orthorhombic crystal structure by the B_1-flux method In order to investigate the amsotropic properties, the magnetic susceptibility, magnetization and electrical resistivity measurements have been performed along the principal axes. From these measurements, it is found that CePtGe_2 orders ferromagnetically below T_c = 5.1 K, and the magnetic easy-axis corresponds to the α-axis. The anisotropic properties have been analyzed on the basis of the crystalline electric field model. We have also studied the pressure effect on the ferromagnetic ordering, and T_c is found to increase with increasing pressure. However, T_c smears out around 3.5 GPa and a new phase appears at higher pressures, where the transition temperature of the new phase also increases with increasing pressure.
社団法人日本物理学会の論文
2003-09-15