Measurements of spin reorientation in YbFeO3 and comparison with modified mean-field theory

Precise measurements of YbFeO₃ magnetization in the spin-reoirentation temperature interval are performed. It is shown that ytterbium orthoferrite is well described by the modified mean-field theory recently developed for ErFeO₃ . This validates the conjecture about the essential influence of the rare-earth ion’s anisotropic paramagnetism on the magnetization behavior in the reorientation regions of all orthoferrites with Γ₄→Γ₂₄→Γ₂ phase transitions.