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Issue 21, 2018
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Direct observation of dynamical magnetization reversal process governed by shape anisotropy in single NiFe2O4 nanowire

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Abstract

Discovering how the magnetization reversal process is governed by the magnetic anisotropy in magnetic nanomaterials is essential and significant to understand the magnetic behaviour of micro-magnetics and to facilitate the design of magnetic nanostructures for diverse technological applications. In this study, we present a direct observation of a dynamical magnetization reversal process in single NiFe2O4 nanowire, thus clearly revealing the domination of shape anisotropy on its magnetic behaviour. Individual nanoparticles on the NiFe2O4 nanowire appear as single domain states in the remanence state, which is maintained until the magnetic field reaches 200 Oe. The magnetization reversal mechanism of the nanowire is observed to be a curling rotation mode. These observations are further verified by micromagnetic computational simulations. Our findings show that the modulation of shape anisotropy is an efficient way to tune the magnetic behaviours of cubic spinel nano-ferrites.

Graphical abstract: Direct observation of dynamical magnetization reversal process governed by shape anisotropy in single NiFe2O4 nanowire

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Publication details

The article was received on 16 Feb 2018, accepted on 04 May 2018 and first published on 04 May 2018


Article type: Paper
DOI: 10.1039/C8NR01393D
Citation: Nanoscale, 2018,10, 10123-10129
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    Direct observation of dynamical magnetization reversal process governed by shape anisotropy in single NiFe2O4 nanowire

    J. Zhang, S. Zhu, H. Li, L. Zhu, Y. Hu, W. Xia, X. Zhang, Y. Peng and J. Fu, Nanoscale, 2018, 10, 10123
    DOI: 10.1039/C8NR01393D

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