Coercivity Ageing Effect on FePt Nanoparticles in Mesoporous Silica via Stepwise Synthesis Strategy
Tian-Le Wang1 , Zhi-Gang Li1,2** , Li Zhang1 , Wei-Ping Chen2 , Shang-Shen Feng2** , Wen-Wu Zhong1,2
1 College of Physics and Electronic Engineering, Taizhou University, Taizhou 3180002 Zhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Taizhou 318000
Abstract ：FePt nanoparticles in mesoporous silica are fabricated by a simple stepwise synthesis strategy. A pre-annealing temperature-dependent coercivity-ageing effect in FePt nanoparticles is observed at room temperature. For face-centered cubic (fcc) structured FePt nanoparticles, the ageing effect is sensitive to the pre-annealing temperature, especially when the temperature is close to the phase-transition. The special magnetic behavior of FePt nanoparticles reveals that the physical properties gradually change between fcc and face-centered tetragonal structures, and will deepen our understanding of the mechanism of such magnetism in FePt nanoparticles.
收稿日期: 2017-12-25
出版日期: 2018-05-19
:
75.75.-c
(Magnetic properties of nanostructures)
81.40.-z
(Treatment of materials and its effects on microstructure, nanostructure, And properties)
81.07.Bc
(Nanocrystalline materials)
81.16.Be
(Chemical synthesis methods)
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2018, Vol. 35 
