Synthesis and Characterization of Mn-Doped BiFeO3 Nanoparticles
01 Jan 2009-
TL;DR: In this article, Mn-doped BiFeO3 nanoparticles were synthesized up to 10% of Mn composition by a sol-gel process, and the samples showed high crystallinity with no secondary phase up to 2%.
Abstract: BiFeO3 is a multiferroic material showing antiferromagnetic ordering and ferroelectric behavior simultaneously. Here, Mn-doped BiFeO3 nanoparticles were synthesized up to 10% of Mn composition by a sol-gel process. The samples showed high crystallinity with no secondary phase up to 2% of Mn doping. A phonon peak at 1250 cm−1 in undoped BiFeO3 showed anomalous intensity enhancement in the magnetically ordered phase below TN = 643 K due to a spin-phonon coupling. This behavior was less pronounced in the Mn-doped samples, suggesting a suppression of magnetic ordering between Fe spins by Mn doping.
Citations
More filters
TL;DR: In this paper, the crystal structure of BiFe1−xMnxO3 (0,⩽,x, ⩽ ≤ 0.3) changes from rhombohedral R3c to orthorhombic Pbnm via a biphasic region with increasing x.
40 citations
TL;DR: In this paper, a detailed structural analysis by high-resolution X-ray diffraction and Raman spectroscopy indicates that the grown films exhibit rhombohedral distorted perovskite structure without any impure phase.
Abstract: Enhancement of magnetic and electric properties in multiferroic Mn-substituted BiFeO3 thin films (BiFe1− x Mn x O3 with x = 0.00–0.05) grown via the low-temperature chemical solution deposition process on low-cost substrates like indium tin oxide (ITO)/glass and silicon is reported in this work. A detailed structural analysis by high-resolution X-ray diffraction and Raman spectroscopy indicates that the grown films exhibit rhombohedral distorted perovskite structure without any impure phase. Raman spectroscopic analysis shows all 13 Raman active (4A1 + 9E) phonon modes corresponding to distorted rhombohedral BFO R3c structure. BFO thin film with 5% Mn substitution showed maximum saturation and remnant magnetisation (M s = 16.70 emu/g and M r = 2.58 emu/g) and remarkably reduced leakage current due to distortion in the spin cycloid structure and suppression of oxygen vacancies due to partial replacement of Fe3+ ion by Mn3+ ion, respectively. These enhanced multifunctional properties highlight the potential...
37 citations
TL;DR: In this paper, the magnetic and electrical properties of multiferroic BiFeO3 and its applications in spintronics, photonics, and magnonics have been discussed.
Abstract: Major ways to improve the magnetic and electrical properties of promising multiferroic BiFeO3 and optimize its synthesis have been studied, and its applications in spintronics, photonics, and magnonics have been discussed.
11 citations
TL;DR: In this article, the effects of BiFeO 3 and BaTiO 3 on phase formation, ferromagnetic and ferroelectric properties have been investigated and discussed, and the rhombohedral perovskite phase of specimens was characterized by XRD technique.
11 citations
TL;DR: In this article, multiferroic BiFeO3 nanocrystals with different Pb and Mn contents were synthesized and characterized to determine an optimized composition with high transmittance and good magnetic property.
Abstract: In this study, multiferroic BiFeO3 nanocrystals with different Pb and Mn contents were synthesized and characterized to determine an optimized composition with high transmittance and good magnetic property. The optimized Bi0.95Pb0.05Fe0.85Mn0.15O3 nanocrystal (BPFMO) was then doped into GeO2-PbO-Bi2O3-B2O3 diamagnetic glass in order to enhance physical properties. The optimize BPFMO doping content was investigated to be 5 mol%, however, glass with 2% BPFMO exhibited the best network connectivity, Vicker's hardness and exciting Faraday rotation performance due to the Mn-tailored low band gap, Pb-enhanced polarization, magnetization, densification of nanoscaled Bi0.95Pb0.05Fe0.85Mn0.15O3.
10 citations