Magnetoelectric properties of microwave sintered BiFeO3 and Bi0.90La0.10Fe0.95Mn0.05O3 nanoceramics

• Published in: Materials chemistry and physics Vol. 193; pp. 253 - 259
• Main Authors: Kolte, Jayant, Daryapurkar, A.S., Agarwal, Mohit, Gulwade, D.D., Gopalan, P.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-06-2017
• Subjects: Functional ceramics; Magnetism; Magnetoelectric coupling; Microwave sintering; Multiferroics; Microwave sintering; Magnetism; Functional ceramics; Magnetoelectric coupling; Multiferroics
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2017.02.037

Multiferroic materials have attracted the attention of scientific community all over the world due to smart functionality and attractive applications such as in magnetoelectric memory and magnetoelectric sensors. In this paper, we report on the ferroelectric, magnetic and magnetoelectric properties of microwave sintered BiFeO3 (BFO) and Bi0.90La0.10Fe0.95Mn0.05O3 (BLFMO) ceramics. The ferromagnetic and paramagnetic components have been deconvoluted using standard magnetization equation. The ferromagnetic saturation and paramagnetic susceptibility for BFO are found to be 0.046 emu/g and 1.17 × 10−5 emu/g·Oe respectively. The magnetization in BLFMO increases enormously as compared to BFO due to suppression of cycloid spin. The magnetoelectric voltage coefficient for BFO is 3.37 mV/cm·Oe, while for BLFMO it is 10.11 mV/cm·Oe. As compared to BFO, BLFMO exhibits improved ferroelectric, magnetic and magnetoelectric properties.
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•Ferromagnetic and paramagnetic components calculated from total magnetization.•Magnetoelectric and magnetodielectric coefficients of BFO and BLFMO were measured.•BFO shows linear change in magnetoelectric voltage coefficient with ac magnetic field.•Both BFO and BLFMO follows Ginzburg Landau equation for multiferroics.•Relative to BFO, BLFMO exhibits leakage current that is three order lower.