Structural transition and magnetic properties of Mn doped Bi 0.88 Sm 0.12 FeO 3 ceramics.
N T HienN D VinhN V DangT T TrangH T VanT T ThaoL T HueP T ThoPublished in: RSC advances (2020)
We investigated the effects of Mn doping on the crystal structure, phonon vibration, and magnetic properties of Bi 0.88 Sm 0.12 FeO 3 ceramics. Mn doping effectively modified the rhombohedral symmetry and induced a structural transition from an R 3 c rhombohedral to Pnam orthorhombic structure. Magnetic measurements revealed a weak ferromagnetic behavior, which was related to the canted antiferromagnetic order of the Pnam structure. The cycloidal spin structure of the R 3 c phase could not be suppressed by substitution of Mn at the Fe site. Studies on the self-phase transition and electric field-induced structural transition revealed many changes in coercivity and remanent magnetization, which are believed to originate from the R 3 c / Pnam phase switching along with spin frustration. Observations of the field step-dependent hysteresis loop and the ferromagnetic-like hysteresis loop after poling in an electric field provided direct evidence of phase boundary (PB) ferromagnetism and magnetic coupling at the PB.
Keyphrases
- room temperature
- molecularly imprinted
- transition metal
- crystal structure
- ionic liquid
- high glucose
- diabetic rats
- heavy metals
- drug induced
- transcription factor
- single cell
- metal organic framework
- quantum dots
- high frequency
- oxidative stress
- highly efficient
- mass spectrometry
- atomic force microscopy
- molecular dynamics
- visible light