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Issue 17, 2015
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Direct imaging of the magnetic polarity and reversal mechanism in individual Fe3−xO4 nanoparticles

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Abstract

This work reports on the experimental characterization of the magnetic domain configurations in cubic, isolated Fe3−xO4 nanoparticles with a lateral size of 25–30 nm. The magnetic polarity at remanence of single domain ferrimagnetic Fe3−xO4 nanoparticles deposited onto a carbon–silicon wafer is observed by magnetic force microscopy. The orientations of these domains provide a direct observation of the magneto-crystalline easy axes in each individual nanoparticle. Furthermore, the change in the domain orientation with an external magnetic field gives evidence of particle magnetization reversal mediated by a coherent rotation process that is also theoretically predicted by micromagnetic calculations.

Graphical abstract: Direct imaging of the magnetic polarity and reversal mechanism in individual Fe3−xO4 nanoparticles

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Article information


Submitted
26 Jan 2015
Accepted
01 Apr 2015
First published
03 Apr 2015

Nanoscale, 2015,7, 8110-8114
Article type
Paper
Author version available

Direct imaging of the magnetic polarity and reversal mechanism in individual Fe3−xO4 nanoparticles

C. Moya, Ó. Iglesias-Freire, N. Pérez, X. Batlle, A. Labarta and A. Asenjo, Nanoscale, 2015, 7, 8110
DOI: 10.1039/C5NR00592B

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