Neutron diffraction study of the crystal and magnetic structures of nanostructured Zn.sub.0.34./sub.Fe.sub.2.53./sub.O.sub.4./sub. ferrite

0532460 - FZÚ 2021 RIV NL eng J - Článek v odborném periodiku
Belozerova, N.M. - Kichanov, S.E. - Kozlenko, D. P. - Kaman, Ondřej - Jirák, Zdeněk - Lukin, E.V. - Savenko, B. N.
Neutron diffraction study of the crystal and magnetic structures of nanostructured Zn_0.34Fe_2.53O₄ ferrite.
Journal of Nanoparticle Research. Roč. 22, č. 5 (2020), s. 1-9, č. článku 121. ISSN 1388-0764. E-ISSN 1572-896X
Grant CEP: GA ČR GA19-02584S
Institucionální podpora: RVO:68378271
Klíčová slova: neutron diffraction * magnetometry * ferrite nanoparticles * thermal decomposition
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.253, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1007/s11051-020-04852-4

The structure and magnetic arrangement of Zn0.34Fe2.53O4 in the form of spherical nanoparticles with the mean size of 14 nm, prepared by thermal decomposition method, have been studied by neutron diffraction at 10-300 K. The investigation provides detailed data on lattice parameters, interatomic bond lengths and angles, and ferrimagnetically ordered moments of iron ions in A and B crystallographic sites of the spinel structure. With a help of supplementary result of Mossbauer spectroscopy, the distribution of Zn and Fe ions between A and B sites is determined to (Fe0.823+Zn0.182+)A[Fe1.443+Fe0.272+Zn0.162+□0.13] BO4, where the B-site vacancy □0.13 quantifies the cation non-stoichiometry due to partial oxidation of the ferrite. Within a collinear model of ionic spins, this distribution agrees well with the spontaneous magnetization determined by magnetometry at 5 K of 103.6 Am2/kg equivalent to 4.22 μB per f
Trvalý link: http://hdl.handle.net/11104/0310946