The effect of magneto-crystalline anisotropy on the properties of hard and soft magnetic ferrite nanoparticles

Hajar Jalili; Bagher Aslibeiki; Ali Ghotbi Varzaneh; Volodymyr A Chernenko

doi:10.3762/bjnano.10.133

journal article Open Access Jul 03, 2019

The effect of magneto-crystalline anisotropy on the properties of hard and soft magnetic ferrite nanoparticles

Hajar Jalili Bagher Aslibeiki

Ali Ghotbi Varzaneh Volodymyr A Chernenko

Beilstein Journal of Nanotechnology Vol. 10 pp. 1348-1359 · Beilstein Institut

View at Publisher Save 10.3762/bjnano.10.133

Abstract

Recent advances in the field of magnetic materials emphasize that the development of new and useful magnetic nanoparticles (NPs) requires an accurate and fundamental understanding of their collective magnetic behavior. Studies show that the magnetic properties are strongly affected by the magnetic anisotropy of NPs and by interparticle interactions that are the result of the collective magnetic behavior of NPs. Here we study these effects in more detail. For this purpose, we prepared CoxFe3−xO4 NPs, with x = 0–1 in steps of 0.2, from soft magnetic (Fe3O4) to hard magnetic (CoFe2O4) ferrite, with a significant variation of the magnetic anisotropy. The phase purity and the formation of crystalline NPs with a spinel structure were confirmed through Rietveld refinement. The effect of Co doping on structure, morphology and magnetic properties of CoxFe3−xO4 samples was investigated. In particular, we examined the interparticle interactions in the samples by δm graphs and Henkel plots that have not been reported before in literature. Finally, we studied the hyperthermia properties and observed that the heat efficiency of soft Fe3O4 is about 4 times larger than that of hard CoFe2O4 ferrite, which was attributed to the high coercive field of samples compared with the external field amplitude.

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Details

Published: Jul 03, 2019
Vol/Issue: 10
Pages: 1348-1359
License: View

Authors

Volodymyr A Chernenko

Cite This Article

Hajar Jalili, Bagher Aslibeiki, Ali Ghotbi Varzaneh, et al. (2019). The effect of magneto-crystalline anisotropy on the properties of hard and soft magnetic ferrite nanoparticles. Beilstein Journal of Nanotechnology, 10, 1348-1359. https://doi.org/10.3762/bjnano.10.133

The effect of magneto-crystalline anisotropy on the properties of hard and soft magnetic ferrite nanoparticles

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