The local distortion and electronic behavior in Mn doped BiFeO3

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...

Raman spectroscopy of nanocrystalline Mn-doped BiFeO3thin films

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.

Magnetic and electrical properties of multiferroic BiFeO3, its synthesis and applications

Investigation on ferromagnetic and ferroelectric properties of (La, K)-doped BiFeO3–BaTiO3 solid solution

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.

Bi0.95Pb0.05Fe0.85Mn0.15O3 nanocrystal tailored Faraday rotation of GeO2-PbO-Bi2O3-B2O3 glass

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.

T. Isshiki

Papers

Synthesis and Characterization of Mn-Doped BiFeO3 Nanoparticles