Near room temperature spin reorientation and temperature evolution of magnetic structure in Mn substituted HoFeO3

•Magnetic structure and transitions of 45% Mn substituted HoFeO3 are investigated.•HoFe0.55Mn0.45O3 crystallizes in an orthorhombic structure (Pnma)•Magnetization measurements and specific heat studies show that the sample has a Néel temperature TN ~ 336 K.•A spin reorientation transition is observed at 290 K.•The sample is found to be in mixed Γ4(Ax, Fy, Gz) + Γ1(Gx, Cy, Az) phase from room temperature to 275 K.•Below 275 K, the sample exhibits a pure Γ1(Gx, Cy, Az) structure.