Superparamagnetic Blocking of an Ensemble of Magnetite Nanoparticles upon Interparticle Interactions Full article
| Conference |
VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) 15-19 Aug 2016 , Krasnoyarsk |
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| Journal |
Journal of Magnetism and Magnetic Materials
ISSN: 0304-8853 |
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| Output data | Year: 2017, Volume: 440, Pages: 199-202 Pages count : 4 DOI: 10.1016/j.jmmm.2016.12.046 | ||||||||
| Tags | Blocking temperature, Fe3O4 nanoparticles, Size effect, Superparamagnetic nanoparticles | ||||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Foundation for Basic Research | 16-32-50156 |
Abstract:
We report on the effect of interparticle magnetic interactions in an ensemble of superparamagnetic magnetite particles with an average size of ~8.4 nm dispersed in the diamagnetic matrix on the blocking of this ensemble in external magnetic field. The two limit cases are investigated: the case of strongly interacting particles, when the value of magnetic dipole-dipole interaction between particles is comparable with the energy of other interactions in the ensemble (the interparticle distance is similar to the nanoparticle diameter) and the case of almost noninteracting particles distant from each other by about ten particle diameters. We demonstrate that the experimental dependence of the blocking temperature on external field is described well within the model [1], in which the density of particles in a nonmagnetic medium is taken into account and the correlation value depends on external magnetic field. The model for describing the magnetic properties of a disperse nanoparticle ensemble is proposed, which makes corrections related to the particle size and mean dipole-dipole interaction energy for the anisotropy constant. The surface magnetic anisotropy of Fe3O4 particles and parameters of the interparticle coupling are estimated.
Cite:
Balaev D.A.
, Semenov S.V.
, Dubrovskiy A.A.
, Yakushkin S.S.
, Kirillov V.L.
, Martyanov O.N.
Superparamagnetic Blocking of an Ensemble of Magnetite Nanoparticles upon Interparticle Interactions
Journal of Magnetism and Magnetic Materials. 2017.
V.440. P.199-202. DOI: 10.1016/j.jmmm.2016.12.046
WOS
Scopus
РИНЦ
AN
OpenAlex
Superparamagnetic Blocking of an Ensemble of Magnetite Nanoparticles upon Interparticle Interactions
Journal of Magnetism and Magnetic Materials. 2017.
V.440. P.199-202. DOI: 10.1016/j.jmmm.2016.12.046
WOS
Scopus
РИНЦ
AN
OpenAlex
Files:
Full text from publisher
Dates:
| Submitted: | Nov 21, 2016 |
| Accepted: | Dec 18, 2016 |
| Published online: | Dec 20, 2016 |
| Published print: | Oct 15, 2017 |
Identifiers:
| Web of science: | WOS:000406865200055 |
| Scopus: | 2-s2.0-85014224373 |
| Elibrary: | 31044993 |
| Chemical Abstracts: | 2017:370658 |
| OpenAlex: | W2566328535 |