| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1331987 | Journal of Solid State Chemistry | 2014 | 5 Pages |
•L12-FePt3, L10-FePt and L12-Fe3Pt NPs were synthesized by sol–gel method.•The chemical order parameter S affects the magnetic properties of the Fe–Pt alloy.•Structural and magnetic properties of the Fe–Pt alloy NPs were studied.•The synthetic route in this study will open up the possibilities of practical use.
The FexPt100−x nanoparticles (NPs) with different nominal atomic rations (30≤x≤80) were synthesized at 700 °C by the sol–gel method. The structure, morphology and magnetic properties of the samples were investigated. When the Fe content in the Fe–Pt alloy NPs was 30 at%, FePt3 NPs were successfully synthesized. With the increase in Fe content up to 50 at%, it was found that the superlattice reflections (0 0 1) and (1 1 0) appeared, which indicated the formation of the L10-FePt phase. Meanwhile, the FePt3 fraction was reduced. When the Fe content increased to 60 at%, single-phase L10-FePt NPs were synthesized. The coercivity (Hc), saturation magnetization (Ms) and chemical order parameter S for Fe60Pt40 NPs were as high as 10,200 Oe, 17.567 emu/g and 0.928, respectively. With the further increase of the Fe content to 80 at%, only Fe3Pt phase existed and the Hc of the Fe3Pt NPs decreased drastically to 360 Oe.
Graphical abstractFe3Pt, FePt and FePt3 nanoparticles was obtained by sol–gel method. The effect of iron and platinum content on structural and magnetic properties of the FePt nanoparticles was investigated.Figure optionsDownload full-size imageDownload as PowerPoint slide
