Masato Endo

Crystalline electric field effect in single crystalline HoNi

The heat capacity of HoNi was measured in the temperature range from 1.7 to 80 K. The Schotky-type anomaly was explained by the crystalline electric field effect on the basis of the point charge model.

HIGH FIELD MAGNETIC PROPERTIES IN SINGLE CRYSTAL ND3CO

Magnetization as a function of field was measured in pulsed fields of up to 40 T at various temperatures along the principal axes of single crystal Nd3Co. Along the a axis we observed metamagnetic transitions at fields of 1.9 and 4.5 T at 4.2 K. We also observed a sharp increase in the magnetic moment in applied fields between 9.5 and 14 T. Along the b axis a metamagnetic transition was observed at a field of 1.5 T at 4.2 K. Along the c axis we observed ferromagnetic behavior. The H–T (magnetic field and temperature) phase diagram was obtained using a superconducting quantum interference device magnetometer.

Magnetic Properties of Single-Crystalline Pr3Co

Magnetization curve, magnetic susceptibility and electrical resistivity were measured for Pr 3 Co single crystals. The magnetization curves at 1.5 K were measured in magnetic fields up to 7 T. Metamagnetic transitions were observed at 0.85 T along the a -axis and 6.4 T along the b -axis, respectively. From the magnetic susceptibility, the effective magnetic moment is deduced to be 3.59 µ B /Pr ion, which is in good agreement with the Pr 3+ free ion value.

Multiple metamagnetic transitions of Nd3Co single crystal

The magnetic susceptibility, electrical resistivity and specific heat as a function of temperature have been investigated for Nd 3 Co single crystal. Three transitions at 8.5 K, 14 K and 25 K were observed. Furthermore, the complex metamagnetic transitions were observed in the magnetization curves along the a - and b -axes. These magnetization processes are explained by the pseudo-two-sublattice ferromagnetic model.

Thermal conductivity of intermetallic compound NdNi

The temperature dependence of thermal conductivity and electrical resistivity was measured for the polycrystalline ferromagnetic compound NdNi and nonmagnetic LaNi in the temperature region from 2 to 40 K. Anomalies were observed in the temperature dependence of thermal conductivity, electrical resistivity and Lorenz number of NdNi at 14 and 27 K due to the magnetic scattering process. Assuming the validity of the Wiedemann-Franz law, we have tried to separate the electron and phonon components of thermal conductivity of nonmagnetic compound LaNi.