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dc.date.accessioned | 2019-01-22T20:41:09Z | |
dc.date.available | 2019-01-22T20:41:09Z | |
dc.date.issued | 2018 | |
dc.identifier.issn | 1063-7834 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/148285 | |
dc.description.abstract | © 2018, Pleiades Publishing, Ltd. FeO/Fe3O4 nanoparticles were synthesized by thermal decomposition. Electron microscopy revealed that these nanoparticles were of the core-shell type and had a spherical shape with an average size of ~20 nm. It was found that the obtained FeO/Fe3O4 nanoparticles had exchange coupling. The effect of anisotropy on the efficiency of heating (hyperthermic effect) of FeO/Fe3O4 nanoparticles by an external alternating magnetic field was examined. The specific absorption rate (SAR) of the studied nanoparticles was 135 W/g in the experiment with an external alternating magnetic field with a strength of 600 Oe and a frequency of 310 kHz. These data led to an important insight: the saturation magnetization is not the only factor governing the SAR, and the efficiency of heating of magnetic FeO/Fe3O4 nanoparticles may be increased by enhancing the effective anisotropy. Mössbauer spectroscopy of the phase composition of the synthesized nanoparticles clearly revealed the simultaneous presence of three phases: magnetite Fe3O4, maghemite γ-Fe2O3, and wustite FeO. | |
dc.relation.ispartofseries | Physics of the Solid State | |
dc.title | Mössbauer Studies of Core-Shell FeO/Fe<inf>3</inf>O<inf>4</inf> Nanoparticles | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 2 | |
dc.relation.ispartofseries-volume | 60 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 382 | |
dc.source.id | SCOPUS10637834-2018-60-2-SID85042749985 |