Tuning the Magnetic Order in Sc-Substituted Barium Hexaferrites
| Autor: | A.V. Trukhanov, I. M. Isaev, Vladimir V. Korovushkin, K.A. Astapovich, A. T. Morchenko, Sergei V. Trukhanov, V.G. Kostishyn, Larissa V. Panina, Vitalii Turchenko, M.A. Darwish |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Magnetometer Spinel chemistry.chemical_element Barium 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Electronic Optical and Magnetic Materials Ion law.invention Crystallography chemistry Atomic orbital law visual_art 0103 physical sciences Mössbauer spectroscopy engineering visual_art.visual_art_medium Crystallite Ceramic 010306 general physics 0210 nano-technology |
| Zdroj: | IEEE Magnetics Letters. 10:1-5 |
| ISSN: | 1949-3088 1949-307X |
| DOI: | 10.1109/lmag.2019.2955632 |
| Popis: | Polycrystalline BaFe12- x Sc x O19 hexaferrites ( x = 0.1, 0.6, and 1.2), produced using ceramic technology, have hexagonal structure with space group (P63/mmc) as determined by neutron powder diffraction. Magnetic properties were analyzed by vibrating sample magnetometry and Mossbauer spectroscopy. Tuning the magnetic parameters by Sc substitution is associated with several factors: first, ordering the Sc3+ ions in positions 2 b and 4 f 2 and the cation vacancies at the boundary of the spinel and hexagonal blocks; second, transfer of spin density from Fe ions localized at position 12 k to 3 d orbitals of Sc3+ ions; third, weakening the indirect exchange interactions between 2 b , 4 f 2, and 12 k sublattices; and finally, presence of a noncollinear magnetic order for Sc concentration x above 0.6. |
| Databáze: | OpenAIRE |
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