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 |
|