Abstract
A method is described by which both the direction angle and the magnitude of a magnetization are measured with a vibrating sample magnetometer using a modified detection coil system. Applying the method to a SmFeO3 crystal, it was found that the spontaneous magnetization decreases about 5% in the spin reorientation temperature region. Measuring the magnetic anisotropy constants by a torque method, the lower and upper boundaries of the reorientation region were determined as 184±0.5 and 192.5±0.5°C respectively, and the temperature dependence of the rotation angle was calculated.
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