Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5489306 | Journal of Crystal Growth | 2017 | 11 Pages |
Abstract
Single crystalline Mn2-xFexBO4 with x = 0.3, 0.5, 0.7 grown by the flux method have been studied by means of X-ray diffraction and X-ray absorption spectroscopy at both Mn and Fe K edges. The compounds were found to crystallize in an orthorhombic warwickite structure (sp. gr. Pnam). The lattice parameters change linearly with x thus obeying the Vegard's law. The Fe3+ substitution for Mn3+ has been deduced from the X-ray absorption near-edge structure (XANES) spectra. Two energy positions of the absorption edges have been observed in Mn K-edge XANES spectra indicating the presence of manganese in two different oxidation states. Extended X-ray absorption fine structure (EXAFS) analysis has shown the reduction of local structural distortions upon Fe substitution. The magnetization data have revealed a spin-glass transition at TSG = 11, 14 and 18 K for x = 0.3, 0.5 and 0.7, respectively.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
M.S. Platunov, N.V. Kazak, Yu.V. Knyazev, L.N. Bezmaternykh, E.M. Moshkina, A.L. Trigub, A.A. Veligzhanin, Y.V. Zubavichus, L.A. Solovyov, D.A. Velikanov, S.G. Ovchinnikov,