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http://hdl.handle.net/10773/20521
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kalanda, N. A. | pt |
dc.contributor.author | Kovalev, L. V. | pt |
dc.contributor.author | Waerenborgh, J. C. | pt |
dc.contributor.author | Soares, M. R. | pt |
dc.contributor.author | Zheludkevich, M. L. | pt |
dc.contributor.author | Yarmolich, M. V. | pt |
dc.contributor.author | Sobolev, N. A. | pt |
dc.date.accessioned | 2017-12-07T19:50:00Z | - |
dc.date.issued | 2015 | pt |
dc.identifier.issn | 1947-2935 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/20521 | - |
dc.description.abstract | Strontium ferromolybdate (Sr2FeMoO6-delta, SFMO) is a material exhibiting promising magnetoresistive properties. We have synthesized SFMO samples out of simple oxides (SrCO3, Fe2O3, and MoO3) or partially reduced SrFeO3-x (SFO) and SrMoO4-y (SMO) precursors. The samples have been experimentally investigated using X-ray diffraction, temperature-dependent magnetization, Mossbauer effect and ferromagnetic resonance measurements. Samples of the first type contain a high density of defects, especially [Fe-Mo], [Mo-Fe] antisites, and do not exhibit any superstructural ordering of the iron and molybdenum ions (P=0%). These samples comprise iron cations in a mixed valence state, Fe2+/3+, and are characterized by a higher magnetic inhomogeneity than those synthesized out of precursors. The use of the latter increases the sample density and brings about a growth acceleration, synthesis temperature reduction, as well as the appearance of a superstructural ordering of the Fe3+ and Mo5+ cations with P=64%. The samples exhibit magnetic anisotropy and consist of nanosize grains. Zero-field-cooling measurements of the temperature dependences of the magnetization reveal a sudden leap of the magnetization at low temperatures (below 23 K) that witnesses the existence of magnetic regions with a low coercivity, in which a superparamagnetic state exists. The obtained results are important for the optimization of the synthesis technology of SFMO for device applications. | pt |
dc.language.iso | eng | pt |
dc.publisher | AMER SCIENTIFIC PUBLISHERS | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876-PPCDTI/126320/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | FERROMAGNETIC-RESONANCE | pt |
dc.subject | MOSSBAUER-SPECTROSCOPY | pt |
dc.subject | ANISOTROPY | pt |
dc.subject | MAGNETORESISTANCE | pt |
dc.subject | CRYSTALLINE | pt |
dc.subject | SOLIDS | pt |
dc.subject | MODEL | pt |
dc.title | Interplay of Superstructural Ordering and Magnetic Properties of the Sr2FeMoO6-delta Double Perovskite | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 446 | pt |
degois.publication.issue | 3 | pt |
degois.publication.lastPage | 454 | pt |
degois.publication.title | SCIENCE OF ADVANCED MATERIALS | pt |
degois.publication.volume | 7 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1166/sam.2015.2134 | pt |
dc.identifier.doi | 10.1166/sam.2015.2134 | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Interplay of Superstructural Ordering and Magnetic Properties of the Sr2FeMoO6-delta Double Perovskite_10.1166sam.2015.2134.pdf | 2.05 MB | Adobe PDF |
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