1998 Volume 39 Issue 12 Pages 1220-1224
Single-Crystal TmNi samples were grown by use of a metallic crucible. The temperature dependence of specific heat was measured in the temperature range from 1.4 to 80 K by the adiabatic method and two transitions were observed at 2.7 and 3.8 K. In addition, the Schottky-type specific heat was observed and it was discussed on the basis of energy level splitting due to crystalline electronic field effect. The magnetization curves were measured in a field up to 5 T at various temperatures for principal axes. We proposed the magnetic structure in the lower temperature region. The magnetic susceptibilities were measured in the temperature range from 5.0 to 300 K for principal axes, and the average value of the effective magnetic moment for principal axes was estimated at 8.9×10−29 Wb·m/Tm3+, which is in good agreement with the Tm3+ free ion value.
