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Complex magnetic behavior in the antipolar phase of Bi1-xLaxFe1-xMnxO3
Authors: V.A. Khomchenko; J.A. Paixão
Ref.: Mater. Lett. 398, 138995 (2025)
Abstract: We report a comprehensive structural and magnetic characterization of the Bi0.75La0.25Fe0.75Mn0.25O3 perovskite, targeting the poorly understood intermediate doping regime of the Bi1-xLaxFe1-xMnxO3 system. X-ray and neutron powder diffraction reveal that the compound adopts an orthorhombic Pbam structure, analogous to that found in antiferroelectric PbZrO3. Analysis of the room-temperature neutron diffraction data identifies G-type antiferromagnetic ordering of Fe/Mn moments along the c-axis, with no evidence of a ferromagnetic component that could account for previously reported large spontaneous magnetization. Instead, a complex temperature-dependent evolution of the magnetic state is observed, involving a transition from a canted to a collinear antiferromagnetic configuration, followed by the reemergence of weak spontaneous magnetization at low temperatures.
