Title : Observation of spin-reorientation transitions in BiFeO3 multiferroics modified by lead and titanium
Abstract:
We report the synthesis and basic characterization details of Bi1−xPbxFe1-xTixO3 (x = 0.05 and 0.1) samples. The polycrystalline bulk sample of Bi1−xPbxFe1-xTixO3 (x = 0.05 and 0.1) have been synthesized by conventional solid-state reaction method. The effects of partially doping of Pb and Ti ion on structural, vibrational and magnetic properties of BiFeO3 have been investigated. Structural studies are carried out using X-ray diffraction (XRD) and Raman scattering spectroscopy. Rietveld refinement of XRD data confirmed the phase formation of the compounds and suggest that samples possess rhombohedral (R3c, 100%) symmetry for x = 0.05 and R3c (99%) + P4mm (1%) symmetry for x = 0.1, respectively. X-ray absorption spectroscopy has been probed at Fe L2,3 and O K-edges to determine the valence (charge) state of Fe in BiFeO3. Interestingly, magnetic measurement results reveal the existence of spin-reorientation transition in Pb and Ti modified BiFeO3, which indicates that these studied samples of BiFeO3 may find promising application in memory and spintronic devices.
- In recent years, multifunctional multiferroics, which have two or more ferroic properties (such as ferroelectricity, (anti)ferromagnetism, or ferroelasticity), have generated increasing levels of interest in the world of novel multifunctional materials, due to the possibility of controlling magnetic order with an electric field, and vice-versa. Due to the interaction between spin and charge, the coexistence of ferroelectricity and ferromagnetism has the potential to exhibit magnetoelectric effects.
- Magnetoelectric effects on multiferroics are expected to have great impact on the production of future advanced devices.
