Abstract
The discontinuous magnetization processes of the TbMn 6Sn 6 compound have been studied by magnetization measurements on aligned powders in the temperature range 170–320 K and in magnetic fields up to 40 T. The observed magnetization jumps are associated with a first-order magnetization processes. The magnetization curves can be described well in the framework of a phenomenological approach that includes the magnetocrystalline anisotropy energy contributions of first and second order. The anisotropy constants K 1 and K 2 were obtained from fitting of the magnetization curves. The values of K 1 and K 2 gradually change from 2.2×10 6 to −4.9×10 4 J m −3 and from −4.87×10 5 to −3.8×10 4 J m −3, respectively, with temperature increase from 170 to 320 K.
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