Effect of Fe-Substitution on the Structure and Magnetism of Single Crystals Mn2-xFexBO4
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Journal of Crystal Growth
ISSN: 0022-0248
|
| Вых. Данные |
Год: 2017,
Том: 475,
Страницы: 239-246
Страниц
: 8
DOI:
10.1016/j.jcrysgro.2017.06.026
|
| Ключевые слова |
A1. Crystal structure; A1. Low dimensional structures; A2. Single crystal growth; B1. Borates; B2. Magnetic materials |
| Авторы |
Platunov M.S.
1,2
,
Kazak N.V.
1
,
Knyazev Yu.V.
1
,
Bezmaternykh L.N.
1
,
Moshkina E.M.
1
,
Trigub A.L.
3
,
Veligzhanin A.A.
3
,
Zubavichus Y.V.
3
,
Solovyov L.A.
4
,
Velikanov D.A.
1
,
Ovchinnikov S.G.
1
|
| Организации |
| 1 |
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
|
| 2 |
ESRF-The European Synchrotron
|
| 3 |
National Research Centre ‘‘Kurchatov Institute”
|
| 4 |
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS
|
|
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.