中国物理B ›› 2019, Vol. 28 ›› Issue (7): 77504-077504.doi: 10.1088/1674-1056/28/7/077504

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Field-variable magnetic domain characterization of individual 10 nm Fe3O4 nanoparticles

Zheng-Hua Li(李正华), Xiang Li(李翔), Wei Lu(陆伟)   

  1. 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
  • 收稿日期:2019-01-25 修回日期:2019-05-05 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Xiang Li E-mail:xiangli@usst.edu.cn
  • 基金资助:

    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).

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. 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
  • Received:2019-01-25 Revised:2019-05-05 Online:2019-07-05 Published:2019-07-05
  • Contact: Xiang Li E-mail:xiangli@usst.edu.cn
  • Supported by:

    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).

摘要:

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.

关键词: Fe3O4 nanoparticles, magnetic force microscopy, magnetic domain

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.

Key words: Fe3O4 nanoparticles, magnetic force microscopy, magnetic domain

中图分类号:  (Magnetic recording materials)

  • 75.50.Ss
75.78.Cd (Micromagnetic simulations ?)