Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 106, Issue -, Pages 28-32Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.07.034
Keywords
Nanoparticle monolayer film; Magnetic anisotropy; MAPLE; Dynamic cantilever magnetometry; Monte-Carlo simulation; Dipolar interaction
Funding
- National Nat-ural Science Foundation of China [51771219, 51771220, 52171184]
- Zhejiang Provincial Natural Science Foun-dation of China [LD19E010001]
- Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science [20180510 0 08]
- National Key Research and Development Pro-gram of China [2017YFA0303201]
- Major Program of Devel-opment Foundation of Hefei Center for Physical Science and Tech-nology [2017FXZY003]
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This study presents a new method for fabricating large-scale Fe3O4 nanoparticle monolayer films and demonstrates the significant role of inter-particle interactions in the formation of magnetic anisotropy.
Magnetically anisotropic nanoparticle monolayer films are of great interest for the development of applications such as high-density data storage, sensors. However, the formation of large-scale magnetically anisotropic monolayer film is a challenging task. Here, we provide a new way to fabricate large-scale area of Fe3O4 nanoparticle monolayer films by vacuum deposition technique (matrix-assisted pulsed laser evaporation, MAPLE). During the deposition process, only interactions between nanoparticles influence nanoparticle self-assembly behaviors. A strong magnetic anisotropy, characterized by in-plane and out-of-plane coercivity and saturation field obtained by DCM (dynamic cantilever magnetometry), was obtained both in cubic and spherical Fe3O4 nanoparticle monolayer films. The inter-particle dipolar interaction but not crystal anisotropy is responsible for this effective magnetic anisotropy, which has been proved by Monte-Carlo simulations. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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