Hexaferrite multiferroics: from bulk to thick films

• Published in: Journal of physics. Conference series Vol. 992; no. 1; pp. 12058 - 12062
• Main Authors: Koutzarova, T, Ghelev, Ch, Peneva, P, Georgieva, B, Kolev, S, Vertruyen, B, Closset, R
• Format: Journal Article Web Resource
• Language: English
• Published: Bristol IOP Publishing 01.03.2018; Institute of Physics Publishing
• Subjects: Characteristic peaks; Chemistry; Chimie; Cobalt ferrites; Engineering, computing & technology; Ferrite; Film preparation; Hexagonal particles; Hexagonal shapes; Ingénierie, informatique & technologie; Iron compounds; Materials science & engineering; Micro-structural properties; Microstructural analysis; Microstructure; Microstructure analysis; Pelletizing; Pellets; Physical, chemical, mathematical & earth Sciences; Physics; Physique; Physique, chimie, mathématiques & sciences de la terre; Science des matériaux & ingénierie; Sol-gel auto-combustion; Sol-gel processes; Sol-gels; Strontium compounds; Thick films; Z-type hexaferrite
• ISSN: 1742-6588; 1742-6596; 1742-6596
• DOI: 10.1088/1742-6596/992/1/012058

We report studies of the structural and microstructural properties of Sr3Co2Fe24O41 in bulk form and as thick films. The precursor powders for the bulk form were prepared following the sol-gel auto-combustion method. The prepared pellets were synthesized at 1200 °C to produce Sr3Co2Fe24O41. The XRD spectra of the bulks showed the characteristic peaks corresponding to the Z-type hexaferrite structure as a main phase and second phases of CoFe2O4 and Sr3Fe2O7-x. The microstructure analysis of the cross-section of the bulk pellets revealed a hexagonal sheet structure. Large areas were observed of packages of hexagonal sheets where the separate hexagonal particles were ordered along the c axis. Sr3Co2Fe24O41 thick films were deposited from a suspension containing the Sr3Co2Fe24O41 powder. The microstructural analysis of the thick films showed that the particles had the perfect hexagonal shape typical for hexaferrites.