Direct observation of dynamical magnetization reversal process governed by shape anisotropy in single NiFe2O4 nanowire
KAUST DepartmentMaterial Science and Engineering Program
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/630405
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AbstractDiscovering 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.
CitationZhang J, Zhu S, Li H, Zhu L, Hu Y, et al. (2018) Direct observation of dynamical magnetization reversal process governed by shape anisotropy in single NiFe2O4 nanowire. Nanoscale 10: 10123–10129. Available: http://dx.doi.org/10.1039/c8nr01393d.
SponsorsThis study was supported by National Natural Science Foundation of China (11604130, 51601082, 51571104 and 51771085), the Fundamental Research Funds for the Central Universities (lzujbky-2015-304 and lzujbky-2015-305) and Open Project of Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University (LZUMMM2018013).
PublisherRoyal Society of Chemistry (RSC)