Bulg. J. Phys. vol.42 no.2 (2015), pp. 200-233

Neutron Diffraction Assisted Investigations of Magnetoelectric Materials at INRNE – BAS

K. Krezhov
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Tsarigradsko Chaussee 72, BG-1784 Sofia, Bulgaria
Abstract. Determination of space symmetry lowering at ferroelectric transitions in combination with high sensitivity to changes in spin arrangements in magnetically ordered materials makes neutron diffraction among the major tools in the research on magnetoelectric effects in solid state. First, we introduce the notion of magnetoelectric effects and multiferroics and the classification in the field. Then, we outline the possibility to identify candidate magnetoelectric multiferroics based primarily on considerations of symmetry and the knowledge of the magnetic structure. Subsequently, we summarize our research on such single phase materials. The systems studied were perovskites from the Bi-based feroxides and manganites, colossal magnetoreresistive oxides, double perovskites Ba2FeSbO6 and Ba2CoSbO6, mixed oxides YFexCr1-xO3 and other materials like Y-type hexaferrites.

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