Abstract
The structural transition in Bi0.84La0.16Fe1-xMnxO3 (0.1 ≤ x ≤ 0.5) ceramics crossing the Pbam/Imma phase boundary has been explored by adopting a combination of the powder x-ray diffraction and Raman scattering spectroscopy. The mixed-phase compositions show a weak ferromagnetism and display intriguing magnetic properties. The observation of magnetic aging behavior is a convincing argument in favor of the dynamic behavior of phase boundary (PB) spins, which governs the weak ferromagnetism along with the Dzyaloshinskii-Moriya interaction. The PB ferromagnetism at the Pbam/Imma boundary produce a ferromagnetic-like hysteresis loop, which is far different from the well know non-saturation of antiferromagnetic behavior of BiFeO3.
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