| Issue |
EPJ Web Conf.
Volume 286, 2023
European Conference on Neutron Scattering 2023 (ECNS 2023)
|
|
|---|---|---|
| Article Number | 05006 | |
| Number of page(s) | 8 | |
| Section | Magnetism and Materials | |
| DOI | https://doi.org/10.1051/epjconf/202328605006 | |
| Published online | 09 October 2023 | |
https://doi.org/10.1051/epjconf/202328605006
Influence of nonmagnetic cation substitution on magnetic order temperature in Y-type hexaferrites: Ba0.5Sr1.5Zn2Fe12O22 and Ba0.5Sr1.5Zn2Al0.08Fe11.92O22
1 Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria
2 Neofit Rilski South-Western University, 66 Ivan Mihailov Str., 2700 Blagoevgrad, Bulgaria
3 Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. Georgi Bonchev str., 1113 Sofia, Bulgaria
4 Greenmat, Chemistry Department, University of Liege, 11 allée du 6 août, 4000 Liège, Belgium
5 Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Ul. Okólna 2, 50-422 Wroclaw, Poland
6 TUZEFRM Forschungs-Neutronenquelle, Heinz Maier-Leibnitz (FRM II) 85748 Garching b. München, Lichtenbergstr. 1, Germany
* Corresponding author: kiril.krezhov@gmail.com
Published online: 9 October 2023
With a view to the proven multiferroic properties of the title representatives of the Y-type hexaferrites as single crystals we present here a comparative study of their microstructure and magnetic properties for powders. The polycrystalline materials of Ba0.5Sr1.5Zn2Fe12O22 (S1) and its doped with aluminium derivative Ba0.5Sr1.5Zn2Al0.08Fe11.92O22 (S2) were synthesized by two different techniques: citric-acid sol-gel auto-combustion and sonochemical co-precipitation. Their atomic-level structure determination was checked by X-ray and neutron diffraction, electron diffraction and imaging methods, and their physical characterization was carried out by magnetometry. SEM images show that the microstructure strongly depends on the method of synthesis: non-uniform hexagonal grans are formed in case of auto-combustion whereas particles of nearly perfect hexagonal shape are observed in case of sonochemical co-precipitation. With lowering the temperature to 5 K several magnetic phase transitions were observed, more clearly pronounced in S2 powders. Neutron diffraction data in vicinity and above room temperature help in revealing the effect of magnetic dilution on the observed magnetic properties.
© The Authors, published by EDP Sciences, 2023
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