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http://hdl.handle.net/10773/27889
Title: | Small-angle neutron scattering and magnetically heterogeneous state in Sr2FeMoO6–δ |
Author: | Kalanda, Nikolay Garamus, Vasil Avdeev, Mikhail Zheludkevich, Mikhail Yarmolich, Marta Serdechnova, Maria Wieland, D. C. Florian Petrov, Alexander Zhaludkevich, Aliaksandr Sobolev, Nikolai |
Keywords: | Strontium ferromolybdate Superstructure ordering Oxygen non-stoichiometry Magnetization Small-angle neutron scattering |
Issue Date: | May-2019 |
Publisher: | Wiley |
Abstract: | Single-phase strontium ferromolybdate (Sr2FeMoO6–δ) samples with different degrees of the superstructural ordering of the Fe/Mo cations were obtained from partially reduced SrFeO3–х, SrMoO4 precursors by the solid-state technology. The study of the temperature dependences of the magnetization measured in the field-cooling and zero-field-cooling regimes indicated an inhomogeneous magnetic state of the samples. The presence of magnetic regions of different nature has also been revealed by the small-angle neutron scattering. For the Sr2FeMoO6–δ samples with different superstructural ordering of the Fe/Mo cations and for all values of the magnetic field induction in the range up to 1.5 T and of the scattering vector in the interval 0.1 >q >0.005 Å–1, the analytical dependence I ~ q–α obeys the Porod law (α ≈ 4), which corresponds to an object with a smooth and well-marked surface and polydisperse grain size. Deviations from the Porod law in the q > 0.1 Å–1 region and a weakening of the neutron scattering in applied magnetic fields may be ascribed to magnetic inhomogeneities with diameters D <6 nm, which are partially destroyed /oriented by magnetic fields В ≥1.5 T. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/27889 |
DOI: | 10.1002/pssb.201800428 |
ISSN: | 0370-1972 |
Appears in Collections: | DFis - Artigos I3N-FSCOSD - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Kalanda et al (AAM) - Phys. Status Solidi B 2019, 256, 1800428.pdf | 1.21 MB | Adobe PDF | View/Open |
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