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Effects of high magnetic field annealing on FePt nanoparticles with shape-anisotropy and
Chun Wu1, Yanan Jiang1, Zhiyuan Niu1
1School of Materials Science and Engineering, Liaoning Technical University Fuxin 123000 China chun_wu@126.com.
Abstract:
The concave-cube FePt nanoparticles (NPs) with shape-anisotropy and element-distribution-anisotropy were annealed under a high magnetic field (HMF). The NPs underwent spheroidization and phase transformation during the annealing process. The HMF hardly affected the spheroidizing process of NPs, but obviously facilitated the disorder-order transition of the L10-phase. The L10-phase content, ordering degree, and the coercivity of annealed NPs increased with enhancing the HMF strength. Those results indicated that the nucleation of the L10-phase and ordering diffusion of Fe/Pt atoms were promoted by the HMF.
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