High temperature negative magnetization, spin reorientation and their suppression with magnetic field in ErFe0.55Mn0.45O3 single crystal

Highlights: • ErFe_0.55Mn_0.45O₃ single crystal grown and oriented. • Orders antiferromagnetically below 365 K (Canted AFM, Γ₄ structure). • Weak ferromagnetic moment along c axis becomes zero at T^∗ = 266.4 K. • It becomes negative below 266.4 K, spin reorientation occurs at T_SR = 255 K to Γ₁. • Suitable for practical application for high T_SR and T^∗. ErFe_0.55Mn_0.45O₃ single crystal shows canted antiferromagnetic ordering below 365 K with weak ferromagnetic moment along c axis. On cooling, the magnetic moment is completely suppressed at a certain temperature due to Er and Fe/Mn sublattice compensation, below which negative magnetization is observed. The compensation and negative magnetization temperatures are much higher than those in other orthoferrite systems. There is a spin reorientation transition from ${\text{Γ}}_4\left(G_x,A_y,F_z\right)$ to ${\text{Γ}}_1\left(A_x,G_y,C_z\right)$ structure at 255 K along c axis which is not seen along a and b axes. The spin reorientation is tunable with applied magnetic field and is completely suppressed at sufficiently high magnetic field. The behavior is explained by spin configuration and net magnetization orientation of individual Er and Fe/Mn sublattices. The proposed model is further validated by measurements using 'training' protocol.