Abstract
Magnetization processes in Er 2Fe 14B in external magnetic fields (up to 200 T) applied in the basal plane, at 4.2 and 78 K, have been calculated within a first-principles model of the Er-Fe exchange and crystal field interactions. It has been shown that there are several quite distinct field-induced planar fan-magnetic structures which can be produced by applying an external magnetic field along both the [100] and [110] directions. Our calculations reveal that when the external field is applied along the easy magnetization direction [100], the Fe-sublattice magnetization is not parallel to the applied field direction over a certain applied field range. It is a common phenomenon that before the full spin-flop occurs, there is a magnetic structural transition from canted ferrimagnetic to canted ferromagnetic.
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