Multi-physical field regulation of spin reorientation phase transition in YFe0.7Mn0.3O3 single crystal

This study systematically investigates the regulation of the spin reorientation behavior in YFe0.7Mn0.3O3 (YFMO) single crystal under electric, magnetic, and hydrostatic pressure fields. X-ray photoelectron spectroscopy analysis reveals a characteristic mixed-valence state dominated by Fe2+ along with a high concentration of oxygen vacancies. Magnetic measurements indicate that an electric field of 10 kV/cm does not alter the c axis magnetization, regardless of the field direction. The magnetic response shows clear anisotropy. A high field (>23 kOe) along the a axis induces the Γ2 (Fx) phase, while along the c axis it drives a reversible transition between the Γ1 (Cz) and Γ4 (Fz) phases. Hydrostatic pressure further exhibits versatile regulatory capabilities. It not only shifts the Γ4→Γ1 transition temperature along the c axis but also induces an emergent Γ3 (Fy) phase along the b axis. Consequently, the phase transition pathway expands from a simple Γ4→Γ1 sequence to a complex process involving mixed Γ3 phases. This work elucidates the anisotropic response of YFMO to external fields and reveals the potential of pressure for regulating spin order, providing valuable insights for developing room-temperature spintronic devices.