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Type: Artigo de periódico
Title: Magnetoelectric Properties Of Laminated La0.7ba 0.3mno3-batio3 Ceramic Composites
Author: Clabel H. J.L.
Zabotto F.L.
Nogueira I.C.
Schio P.
Garcia D.
De Lima O.F.
Leite E.R.
Moreira F.M.A.
Cardoso C.A.
Abstract: Multiferroic laminated ceramic composites consisting of piezoelectric (BaTiO3, phase B)-magnetostrictive (La0.7Ba 0.3MnO3, phase L) materials were synthesized by the Pechini method. The composites were sintered separately and in the form of L-B-L, in order to compare the properties of the separate phases and the laminated material. X-ray diffraction analysis of the separate phases revealed a tetragonal structure with the P4/mm space group for the B phase, and an orthorhombic structure with the R-3cH space group for the L phase. The dielectric and magnetic properties, as well as the magnetoelectric coupling coefficients (αME), were measured as a function of frequency. The dielectric constants at 1 kHz were 1560 for the separate B phase and 2970 for the L-B-L sample. Magnetization measurement of the L-B-L pellet showed that the ferromagnetic transition temperature (TC) was around 304 K. Transverse (α31ME) and longitudinal (α33ME) magnetoelectric coupling coefficients were measured for the L-B-L sample at room temperature, and the maximum values obtained were 0.55 and 0.52 mV cm-1 Oe-1, respectively. © 2014 Elsevier B.V.
Editor: Elsevier
Rights: fechado
Identifier DOI: 10.1016/j.jmmm.2014.04.014
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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