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SYNTHESIS AND CHARACTERIZATION OF NICKEL FERRITE-BARIUM TITANATE CERAMIC COMPOSITES

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Magnetoelectric composites were synthesized from piezoelectric BaTiO3 and ferrimagnetic NiFe2O4. These two phases are mixed, mechanically milled and heat treated. A characterization is made by means of electronic microscopy and x-ray diffraction. The results of the magnetic, electric, ferroelectric and piezoelectrical response of two different compositions are obtained. The composites are superparamagnetic in all the measured temperature range. It was observe a magnetic change induced by a structural transition of the ferroelectric phase. The composites behaves as an acceptable mechanical resonator when the content of the ferroelectric phase is equal or greater than 60 wt.%.
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Keywords: composites; ferroelectric properties; functional applications; magnetic properties; piezoelectric properties

Document Type: Research Article

Affiliations: 1: Centro de Investigacion en Materiales Avanzados, Chih, Mexico 2: Grupo POEMMA. E.T.S.I. Telecomunicacion. U.P.M, Madrid, Spain 3: IETCC-CSIC, Madrid, Spain

Publication date: 2008-01-01

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