Halide Ion-Mediated Synthesis of L10-FePt Nanoparticles with Tunable Magnetic Properties.
Nano Lett
; 18(12): 7839-7844, 2018 12 12.
Article
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| MEDLINE
| ID: mdl-30433792
ABSTRACT
L10-FePt nanoparticles (NPs) have great potential in areas of advanced magnetic and catalytic applications. Here, we present a facile control route for synthesis of hard magnetic L10-FePt NPs in which halide ions (Cl-, Br-, or I-) were added to the synthetic process to promote the phase transformation. It is confirmed that the strong ionic binding force between halide ions and Fe3+ or Pt2+ ions could facilitate the formation of L10-FePt phase due to favoring growth of FePt NPs in a more thermodynamically stable way, which enables the formation of an ordered structure. L10-FePt NPs with the highest coercivity of 8.64 kOe and saturation magnetization of 64.21 emu/g at room temperature can be directly obtained by controlling the amount of the halide ions. In comparison with conventional solution phase reduction methods, the halide ion-assisted method shows enhanced capability to tune the growth of hard magnetic bimetallic NPs, particularly Pt-based bimetallic NPs.
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MEDLINE
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En
Revista:
Nano Lett
Año:
2018
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Article
País de afiliación:
China