Journal
CRYSTAL RESEARCH AND TECHNOLOGY
Volume 46, Issue 3, Pages 238-242Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/crat.201100040
Keywords
BiFeO3; multiferroics; crystal structure; magnetic properties
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Funding
- Foundation for Science and Technology of Portugal (FCT)
- Deutsche Forschungsgemeinschaft (DFG)
- Multiceral [NMP3-CT-2006-032616]
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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
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