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The anisotropy of a ferromagnetic single crystal of CrTe with NiAs structure was investigated by magnetic torque measurements. From the experiment it was seen that the axis of easy magnetization is 001 and it does not change from room temperature to liq. He temperature. At 0°K the uniaxial anisotropy constant will be about 5×10 6 erg per cm 3 . As for the origin of anisotropy, the dipole-dipole energy can account for only about 20 percent of the observed value.
Hirone et al. (1960) studied this question.