期刊
ACS APPLIED NANO MATERIALS
卷 3, 期 2, 页码 1098-1103出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.9b02420
关键词
L1(0)-FePt nanoparticles; one-pot synthesis; high coercivity; third-element additives; orderly transformation
资金
- National Natural Science Foundation of China [51871045, 51690161]
- Liaoning Innovative Research Team in University [LT2017011]
- Fundamental Research Funds for the Central Universities [N180912004]
- Doctoral Start-up Foundation of Liaoning Province [2019 -BS -116]
We report a promising strategy to directly synthesize L1(0)-FePt nanoparticles for applications in permanent magnets and catalysts. The element Pb with lower melting point, smaller surface energy, and a bigger atomic radius can improve migration of Fe and Pt atoms and promote orderly diffusion in the L1(0)-FePt nanoparticles by generating vacancies and lattice distortion. The ordering degree and magnetic properties of the nanoparticles can be tuned by changing the molar ratios of Pb/Pt and removing Pb from the nanoparticles. The ultrahigh ordering degree and a coercivity of up to 20.95 kOe were achieved by using a suitable Pb/Pt ratio after removing Pb.
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