Magnetoelectric coupling of manganese ferrite–potassium niobate lead-free composite ceramics synthesized by solid state reaction method

Lead-free composite ceramics xMnFe 2 O 4 -(1 − x) KNbO 3 with the composition of x = 0.20, 0.30 and 0.40 were synthesized by the solid state reaction method to obtain the composites of ferrite and ferroelectric to achieve magnetoelectric coupling. A confirmation study for the formation of spinel cub...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2019-02, Vol.30 (4), p.3411-3417
Main Authors: Komalavalli, P., Shameem Banu, I. B., Anwar, M. Shahid
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry and Materials Science
Composite materials
Composition
Coupling
Current leakage
Electron micrographs
Ferrites
Ferroelectric materials
Ferroelectricity
Image resolution
Image transmission
Lead content
Lead free
Low currents
Magnetic properties
Manganese
Materials Science
Optical and Electronic Materials
Potassium niobates
Solid state
X-ray diffraction
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Summary:Lead-free composite ceramics xMnFe 2 O 4 -(1 − x) KNbO 3 with the composition of x = 0.20, 0.30 and 0.40 were synthesized by the solid state reaction method to obtain the composites of ferrite and ferroelectric to achieve magnetoelectric coupling. A confirmation study for the formation of spinel cubic MnFe 2 O 4 ferrite ceramic and orthorhombic KNbO 3 ferroelectric ceramic was performed by X ray diffraction. The strain in the composite for various compositions was estimated using W–H method to understand the variation of multiferroic features of the ceramic composites. The Transmission Electron Micrograph and High Resolution Transmission Electron Micrograph images reveal the existence of ferrite and ferroelectric phases. Weak magnetic behavior is exhibited by the ferrite-ferroelectric composites as compared to ferrite MnFe 2 O 4 . The 20:80 composite possesses the highest magnetic parameters among the compositions. The 40:60 composite recorded the maximum P r and E c values. The enhanced ME coupling between magnetic and ferroelectric phases is shown for 40:60 composite and the same is good for the lead free multifunctional device. All the composite samples show low current leakage.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-018-00615-z