Enhanced ferroelectric, magnetic and magnetoelectric properties of Bi1−xCaxFe1−xTixO3 solid solutions |
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Authors: | DV Karpinsky IO Troyanchuk NA Sobolev |
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Institution: | a CICECO/Department of Ceramics and Glass Engineering, University of Aveiro, 3810-193 Aveiro, Portugalb SSPA “Scientific-Practical Materials Research Centre of the NAS of Belarus”, P. Brovka str. 19, 220072 Minsk, Belarusc Department of Physics and I3N, University of Aveiro, 3810-193 Aveiro, Portugal |
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Abstract: | We report on the enhanced electromechanical, magnetic and magnetoelectric properties of Bi1−xCaxFe1−xTixO3 solid solutions. The crystal structure of the x≈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. |
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Keywords: | A Semiconductor B Magnetically ordered materials D Exchange and superexchange |
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