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Structural, ferroelectric and magnetic properties of Bi 0.85 Sm 0.15 FeO 3 perovskite
Author(s) -
Khomchenko V. A.,
Paixão J. A.,
Costa B. F. O.,
Karpinsky D. V.,
Kholkin A. L.,
Troyanchuk I. O.,
Shvartsman V. V.,
Borisov P.,
Kleemann W.
Publication year - 2011
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201100040
Subject(s) - ferroelectricity , piezoresponse force microscopy , samarium , orthorhombic crystal system , materials science , magnetization , superlattice , perovskite (structure) , crystallite , crystallography , condensed matter physics , crystal structure , diffraction , chemistry , dielectric , magnetic field , optics , inorganic chemistry , optoelectronics , physics , quantum mechanics
Room temperature crystal structure, ferroelectric and magnetic properties of polycrystalline Bi 0.85 Sm 0.15 FeO 3 samples were investigated. X‐ray diffraction study shows that the compound possesses a dominant PbZrO 3 ‐like orthorhombic structure with √2 a ×2√2 a ×2 a 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 BiFeO 3 and induces the appearance of spontaneous magnetization. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)