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High Magnetic Field Assisted Synthesis of FePtCu Nanoparticles with Tunable Ordered Structure
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Affiliation:

1.Key Laboratory of Anisotropy and Texture of Materials,Ministry of Education,Northeastern University;2.Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University

Clc Number:

TQ586.1

Fund Project:

National Natural Science Foundation of China (Nos. 51871045 and 52071070), Fundamental Research Funds for the Central Universities (No. N2017003), and Doctoral Start-up Foundation of Liaoning Province (No. 2019-BS-116).

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    Abstract:

    High magnetic fields (HMF) can pass high intensity energies to the atomic scale of materials without contact to change the thermodynamic state of materials, and affect the arrangement, matching and migration of atoms and molecules. Therefore, in this work, HMF was introduced into wet-chemical synthesis to prepared FePtCu nanoparticles (NPs). The results show that the FePtCu NPs with L10 structure, uniform morphology, and good dispersibility were successfully prepared under HMF. The HMF increased the size, ordering degree s and the coercivity of the FePtCu NPs. The L10-FePtCu NPs with sizes of about 11 nm and ordering degree of 0.8985 were obtained under the HMF of 6 T. The HMF might magnetize the NPs and cause lattice distortions, which facilitates formation of vacancies or defects in the FePt NPs. A lot of vacancies are effectively accelerate the orderly diffusion of Fe and Pt atoms, and promoted the disordered-ordered transformation of the FePt NPs. Therefore, HMF assistance can accomplish the regulation of ordered structure. This method offers a new path for the direct synthesis of L10 structured nanomaterials.

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[Zhao Dong, Wu Chun, Qiao Pengfei, Wang Jianjun, Wang Qiang, Pei Wenli. High Magnetic Field Assisted Synthesis of FePtCu Nanoparticles with Tunable Ordered Structure[J]. Rare Metal Materials and Engineering,2021,50(12):4534~4538.]
DOI:10.12442/j. issn.1002-185X.20201002

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History
  • Received:December 25,2020
  • Revised:February 01,2021
  • Adopted:February 04,2021
  • Online: January 09,2022
  • Published: December 24,2021