Halide Ion-Mediated Synthesis of L1<sub>0</sub>-FePt Nanoparticles with Tunable Magnetic Properties.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30433792.
- Also identified by DOI 10.1021/acs.nanolett.8b03603.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
L1<sub>0</sub>-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 L1<sub>0</sub>-FePt NPs in which halide ions (Cl<sup>-</sup>, Br<sup>-</sup>, or I<sup>-</sup>) were added to the synthetic process to promote the phase transformation. It is confirmed that the strong ionic binding force between halide ions and Fe<sup>3+</sup> or Pt<sup>2+</sup> ions could facilitate the formation of L1<sub>0</sub>-FePt phase due to favoring growth of FePt NPs in a more thermodynamically stable way, which enables the formation of an ordered structure. L1<sub>0</sub>-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.