Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.27: Poster
Monday, March 9, 2026, 09:30–12:30, P2
Magnetic phase transitions in Z-type magneto-electric hexaferrites — •Borislava Georgieva1, Petya Peneva1, Svetoslav Kolev1,2, Kiril Krezhov1, Chavdar Ghelev1, Lan Maria Tran3, Michał Babij3, Benedicte Vertruyen4, Peter Tzvetkov5, Daniela Kovacheva5, and Tatyana Koutzarova1 — 1Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria — 2Neofit Rilski South-Western University, Blagoevgrad, Bulgaria — 3Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw, Poland — 4CESAM, GREENMAT, Chemistry Institute, University of Liège, Liège, Belgium — 5Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria
The difference is well known in the occurrence of strong magnetoelectric effects in single magnetoelectric materials (ferrites), depending on their physical state. The single-crystal Z-type hexaferrite Sr3Co2Fe24O41 exhibits a magnetoelectric effect at room temperature. We report studies on the structural and magnetic properties of Sr3Co2Fe24O41 in powder and bulk samples, focusing on the influence of the synthesis conditions. The precursor powders were prepared by sol-gel auto combustion and synthesized at 1200-1250 °C. XRD spectra showed characteristic peaks corresponding to the Z-type hexaferrite structure as a main phase. SEM images of the powder sample showed agglomerated particles forming clusters of different sizes and shapes, while in the bulk sample we observed large regions of hexagonal particles. Magnetic phase transitions between 4.2 and 300 K were observed.
Keywords: magnetoelectric materials; Z-type hexaferrite; structural and magnetic properties; magnetic phase transitions; magnetisation measurements