Structural, ferroelectric and magnetic properties of Bi0.85Sm0.15FeO3 perovskite

resumo

Room temperature crystal structure, ferroelectric and magnetic properties of polycrystalline Bi0.85Sm0.15FeO3 samples were investigated. X-ray diffraction study shows that the compound possesses a dominant PbZrO3-like orthorhombic structure with root 2ax2 root 2ax2a superlattice (a is the parameter of the cubic perovskite subcell). In contrast to piezoresponse force microscopy data demonstrating some features characteristic of ferroelectrics, polarization vs. electric field measurements reveal the behavior expected for nonpolar materials. Investigation of magnetic properties confirms that 15% samarium substitution suppresses the spin modulation typical of BiFeO3 and induces the appearance of spontaneous magnetization. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

palavras-chave

MULTIFERROIC BIFEO3; BISMUTH FERRITE; SINGLE-PHASE; CERAMICS; CRYSTAL

categoria

Crystallography

autores

Khomchenko, VA; Paixao, JA; Costa, BFO; Karpinsky, DV; Kholkin, AL; Troyanchuk, IO; Shvartsman, VV; Borisov, P; Kleemann, W

nossos autores

agradecimentos

V. A. Khomchenko is grateful to the Foundation for Science and Technology of Portugal (FCT) for financial support through the

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