Abstract
SmFe1−xMnxO3 (x = 0.0, 0.1, 0.3) polycrystalline powder samples were prepared by sol-gel method, and the obtained samples were all orthorhombic structures with Pbnm space group. Mössbauer spectroscopy at room temperature confirmed the +3 oxidation state of iron. All samples were fitted by sextet spectra, indicating that the samples are magnetically ordered at room temperature. The zero-field-cooled and field-cooled curves of SmFe0.9Mn0.1O3 sample show a reverse crossover trend at 5 K，and the magnetization is significantly enhanced after reaching the spin-switching transition temperature (Tssw∼285 K). SmFe0.7Mn0.3O3 sample exhibits a second-order spin-reorientation transition in the temperature range of 236–281 K. Rare-earth Sm ions underwent a spin-ordered transition from a paramagnetic state to an antiferromagnetic state at around 8 K. Due to the Dzyaloshinskii-Moriya antisymmetric interaction, the M − H curves of the sample at 5 K and 300 K both exhibit weak ferromagnetism.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
