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Spin reorientation is a magnetic phase transition in which rotation of the magnetization vector with respect to the crystallographic axes occurs upon a change in the temperature or magnetic field. For example, SmFeO 3 shows a magnetization rotation from the c axis above 480 K to the a axis below 450 K, known as the Γ 4 → Γ 2 transition. This work reports the successful synthesis of the new single-crystal perovskite SmFe 0.75 Mn 0.25 O 3 and finds interesting spin reorientations above and below room temperature. In addition to the spin reorientation of the Γ 4 → Γ 2 magnetic phase transition observed at around T  SR2 = 382 K, a new spin reorientation, Γ 2 → Γ 1 , was seen at around T  SR1 = 212 K due to Mn doping, which could not be observed in the parent rare earth perovskite compound. This unexpected spin configuration has complete antiferromagnetic order without any canting-induced weak ferromagnetic moment, resulting in zero magnetization in the low-temperature regime. M - T and M - H measurements have been made to study the temperature and magnetic-field dependence of the observed spin reorientation transitions.

Spin-reorientation magnetic transitions in Mn-doped SmFeO3

Spin-reorientation magnetic transitions in Mn-doped SmFeO₃