Enhanced ferroelectric, magnetic and magnetoelectric properties of Bi1-xCaxFe1-xTixO3 solid solutions

resumo

We report on the enhanced electromechanical, magnetic and magnetoelectric properties of Bi1-xCaxFe1-xTixO3 solid solutions. The crystal structure of the x approximate to 0.25 compounds are close to the rhombohedral-orthorhombic phase boundary, and the solid solutions are characterized by increased electromechanical properties due to the polarization extension near the polar-nonpolar border. The homogenous weakly ferromagnetic state is established at x > 0.15 doping. The chemical doping shifts the magnetic transition close to room temperature, thus enlarging the magnetic susceptibility of the compounds. The solid solutions at the morphotropic phase boundary exhibit a nearly twofold increase in piezoelectric response, whereas the magnetoelectric coupling shows five times enhancement in comparison with the parent bismuth ferrite. (C) 2011 Elsevier Ltd. All rights reserved.

palavras-chave

BISMUTH FERRITE; PHASE-TRANSITIONS; ROOM-TEMPERATURE; BIFEO3; MULTIFERROICS; SUBSTITUTION; CRYSTALS

categoria

Physics

autores

Karpinsky, DV; Troyanchuk, IO; Vidal, JV; Sobolev, NA; Kholkin, AL

nossos autores

agradecimentos

This work was supported by FCT/FSE grant SFRH-BPD-42506-2007. J.V.V. acknowledges an I3N Scientific Integration grant.

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