Enhanced dielectric and magnetic properties in multiferroic ceramic

An enhanced low-frequency dielectric constant, (), and ferromagnetic behavior at room temperature were observed in (BYFNO) ceramic sintered by a modified solid state reaction method. The anti-ferromagnetic (AFM) nature of (BFO) changed to ferromagnetic (FM) with saturation magnetization, M s , and c...

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Published in:Materials letters 2016-12, Vol.184, p.17-20
Main Authors: Banerjee, P, Franco, A Jr
Format: Article
Language:English
Subjects:
Ceramics
Coercive force
Dielectric properties
Ferromagnetism
Magnetic properties
Perovskite structure
Sintering
Spin structure
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description An enhanced low-frequency dielectric constant, (), and ferromagnetic behavior at room temperature were observed in (BYFNO) ceramic sintered by a modified solid state reaction method. The anti-ferromagnetic (AFM) nature of (BFO) changed to ferromagnetic (FM) with saturation magnetization, M s , and coercivity H c values of and , respectively at room temperature. The XRD patterns revealed that the co-doping of and ions at the and sites of (BFO) resulted in a rhombohedrally distorted perovskite structure. This result was discussed in terms of the modification of the cycloidal spin structure, presence of carriers and preservation of oxygen vacancy during the sintering process. This enhanced properties entitle the one of the few multiferroic materials that exhibits both significant ferromagnetic and dielectric behaviors at room temperature.
doi_str_mv 10.1016/j.matlet.2016.08.009
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subjects Ceramics
Coercive force
Dielectric properties
Ferromagnetism
Magnetic properties
Perovskite structure
Sintering
Spin structure
title Enhanced dielectric and magnetic properties in multiferroic ceramic
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