کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5489306 | 1524354 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Fe-substitution on the structure and magnetism of single crystals Mn2-xFexBO4
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of Fe-substitution on the structure and magnetism of single crystals Mn2-xFexBO4 Effect of Fe-substitution on the structure and magnetism of single crystals Mn2-xFexBO4](/preview/png/5489306.png)
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 475, 1 October 2017, Pages 239-246
Journal: Journal of Crystal Growth - Volume 475, 1 October 2017, Pages 239-246
نویسندگان
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,