Non-collinear magnetic structures and first-order magnetization process in rare-earth systems

Abstract First-order field-induced spin reorientation transitions in multisublattice intermetallic compounds are considered within an anisotropic Heisenberg model, only leading-order anisotropy constants being included. The exchange interactions both between the rare-earth (RE) and transition metal sublattices and within the RE sublattice play an important role in the model. The latter interaction results in the occurrence of metastable states corresponding to a non-collinear magnetic structure. The possible FOMP scenarios for R 2 Fe 17 , HoFe 11 Ti, and TbMn 6 Sn 6 systems are discussed.