| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Field-variable magnetic domain characterization of individual 10 nm Fe3O4 nanoparticles |
| Zheng-Hua Li(李正华)1, Xiang Li(李翔)2, Wei Lu(陆伟)3 |
1 School of Physics and Materials Engineering, Dalian Minzu University, Dalian 116600, China;
2 School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
3 School of Materials Science and Engineering, Tongji University, Shanghai 200092, China |
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Abstract The local detection of magnetic domains of isolated 10 nm Fe3O4 magnetic nanoparticles (MNPs) has been achieved by field-variable magnetic force microscopy (MFM) with high spatial resolution. The domain configuration of an individual MNP shows a typical dipolar response. The magnetization reversal of MNP domains is governed by a coherent rotation mechanism, which is consistent with the theoretical results given by micromagnetic calculations. Present results suggest that the field-variable MFM has great potential in providing nanoscale magnetic information on magnetic nanostructures, such as nanoparticles, nanodots, skyrmions, and vortices, with high spatial resolution. This is crucial for the development and application of magnetic nanostructures and devices.
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Received: 25 January 2019
Revised: 05 May 2019
Accepted manuscript online:
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PACS:
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75.50.Ss
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(Magnetic recording materials)
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75.78.Cd
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(Micromagnetic simulations ?)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61771092 and 51202146) and the Natural Science Foundation of Shanghai, China (Grant No. 17ZR1419700). |
Corresponding Authors:
Xiang Li
E-mail: xiangli@usst.edu.cn
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Cite this article:
Zheng-Hua Li(李正华), Xiang Li(李翔), Wei Lu(陆伟) Field-variable magnetic domain characterization of individual 10 nm Fe3O4 nanoparticles 2019 Chin. Phys. B 28 077504
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