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Structural and Magnetic Properties of NiFe2-2xSnxCuxO4
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SYSNO ASEP 0357675 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Structural and Magnetic Properties of NiFe2-2xSnxCuxO4 Author(s) Isfahani, M.J.N. (IR)
Myndyk, M. (DE)
Arani, M.E. (IR)
Šubrt, Jan (UACH-T) SAI, RID
Sepelak, V. (DE)Source Title Journal of Magnetism and Magnetic Materials. - : Elsevier - ISSN 0304-8853
Roč. 322, č. 13 (2010), s. 1744-1747Number of pages 4 s. Language eng - English Country NL - Netherlands Keywords ferrimagnetic ; Mossbauer effect ; magnetic property Subject RIV CA - Inorganic Chemistry CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000276514500011 DOI 10.1016/j.jmmm.2009.12.019 Annotation The substituted nickel ferrite (NiFe2-2xSnxCuxO4, x=0, 0.1, 0.2, 0.3) was prepared by the conventional ceramic method. The effect of substitution of Fe3+ ions by Sn4+ and Cu2+ cations on the structural and magnetic properties of the ferrite was studied by means of Fe-57 Mossbauer spectroscopy, alternating gradient force magnetometry (AGFM) and Faraday balance. Whereas undoped NiFe2O4 adopts a fully inverse spinel structure of the type (Fe)[NiFe]O-4, Sn4+ and Cu2+ cations tend to occupy octahedral positions in the structure of the substituted ferrite. Based on the results of Mossbauer spectroscopic measurements, the crystal-chemical formula of the substituted ferrite may be written as (Fe)[NiFe1-2xSnxCux]O-4, where parentheses and square brackets enclose cations in tetrahedral (A) and octahedral [B] coordination, respectively. The Neel temperature and the saturation magnetization values of the NiFe2-2xSnxCuxO4 samples were found to decrease with increasing degree of substitution (x). Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2011
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