High Field Anisotropy and Magnetization of Single Crystal Dysprosium

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Abstract
Torque measurements made on a (0001)single crystal disk of Dy from 77 to 150 K, and in fields up to 130 kOe, give a six‐fold anisotropy K6 6 that increases rapidly with increasing field. Magnetization measurements show no difference in magnetization between the a and b directions in this temperature range; therefore the field dependence of the anisotropy is not due to anisotropic magnetization. The magnetization can be significantly changed by applied field as well as by temperature in the temperature range studied here. The anisotropy is found to be a single‐valued function of the magnetization, whether the magnetization is changed by applied field or by temperature. The experimental data are reasonably well represented by the equation K/K 0 = (σ/σ 0 ) 12 .

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