Abstract
Non-linear magnetic response of rare-earth-3d intermetallics in high magnetic fields are reviewed with special attention for the different mechanisms that can lead to kinks and jogs in the magnetisation curve: metamagnetism of the 3d partner, field-induced crossing of the rare-earth crystal-field levels, breaking of the antiparallel alignment of the rare-earth and 3d magnetic sublattices and anisotropy-related transitions. The latter result from a competition between the rare-earth crystal-field coefficients of different order. By inspecting the high-field magnetisation curves of YCo 2 and LuCo 2, Pr, Dy 2Co 17 and Pr 2Fe 14B, examples can be presented for all four different types of severe non-linearities.
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