J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (4): 560-567.DOI: 10.1016/j.jmst.2018.09.036
• Orginal Article • Previous Articles Next Articles
Q. Zhenga, Z.R. Zhangb1, J. Dub*(), L.L. Linb, W.X. Xiab, J. Zhangb, B.R. Bianb*(), J.P. Liuc
Received:
2018-05-31
Revised:
2018-07-11
Accepted:
2018-09-05
Online:
2019-04-05
Published:
2019-01-28
Contact:
Du J.,Bian B.R.
Q. Zheng, Z.R. Zhang, J. Du, L.L. Lin, W.X. Xia, J. Zhang, B.R. Bian, J.P. Liu. A novel direct reduction method to synthesize ordered Fe-Pt alloy nanoparticles[J]. J. Mater. Sci. Technol., 2019, 35(4): 560-567.
Fig. 1. XRD patterns of the FePt3 NPs prepared at 350 °C (a), 550 °C (b), and 750 °C (c) for 2 h. The lower part is the standard diffraction peaks belonging to that of L12-FePt3 phase with JCPDS card No.29-0716.
Fig. 2. TEM images of FePt3 NPs prepared at 350 °C (a), 550 °C (b), and 750 °C (c) for 2 h. The size distributions of FePt3 NPs prepared at 350 °C (a'), 550 °C (b') and 750 °C (c'). HRTEM (d) and HAADF images of the particles prepared at 550 °C (e). The corresponding elemental maps were given for Pt (f) and Fe (g).
Fig. 4. XRD patterns of Fe3Pt NPs prepared at 550 °C (a), 750 °C (b) for 2 h. The peaks at the lower part are from standard L12-Fe3Pt phase [JCPDS Card No. 71-8365].
Fig. 5. TEM images of Fe3Pt NPs prepared at 550 °C (a), 750 °C (b) for 2 h. The size distributions of Fe3Pt NPs prepared at 550 °C (a') and 750 °C (b').
Fig. 6. Room temperature hysteresis of the FePt3 NPs prepared at different sintering temperatures. The inset gives the temperature dependence of coercivity and magnetization.
Fig. 7. XRD patterns of FePt NPs prepared at 350 °C (a), 550 °C (b), 750 °C (c) for 2 h. The lower part is the standard diffraction peaks belonging to that of L10-FePt phase with JCPDS card No. 43-1359.
Fig. 8. TEM images of FePt NPs prepared at 350 °C (a), 550 °C (b), 750 °C (c) for 2 h. The size distributions of FePt NPs prepared at 350 °C (a'), 550 °C (b') and 750 °C (c'). HRTEM (d) and HAADF (e) images of the particles obtained at 550 °C and their corresponding elemental maps of Pt (f) and Fe (g).
Fig. 9. Room temperature demagnetization curves of FePt NPs prepared at different sintering temperatures. The inset gives the temperature dependence of Hc and Ms.
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