Synthesis and Magnetic Properties of FeCo Alloy Nanoparticles by Hydrogen Plasma Metal Reaction

Abstract:

Fe61Co39 nanoparticles were prepared by hydrogen plasma metal reaction. The as-synthesized nanoparticles were characterized by x-ray differaction (XRD), transimition electron microscope (TEM) and superconducting quantum interference device (SQUID). The nanoparticles are spherical in shape, have bcc structure with the mean particle diameter of 41 nm, and are basically ferromagnetic with a slight amount of superparamagnetic part. The saturation magnetization and coercivity of the nanoparticles at 4.2 K are 190.15 emu/g and 1280 Oe, respectively. The blocking temperature is 250 K in 100 Oe and decreases with increasing the magnetic field.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 2215-2218
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.2215
• Online since: January 2005
• Authors: Yonghua Leng, Yaohua Zhang, Xu Bo Song, Xing Guo Li, Lefu Zhang
• Keywords: Fe-Co Alloy, Ferromagnetism, Hydrogen Plasma Metal Reaction, Nanoparticle, Superparamagnetic

References

[1] J.L. Dorman, D. Fiorani: Magnetic Properties of Fine Particles, North-Holland, Amsterdam, (1992).

[2] Nelli S. Sobal, M. Hilgendorff et al: Nano Letters Vol. 2 (2002), p.621.

[3] Y.B. Pithawalla, M.S. Fl-Shall, S.C. Deevi, V. Strom and K.V. Rao: J. Phys. Chem. B Vol. 105 (2001), p. (2085).

[4] L.L.P. Diandra and D.R. Rieben: Chem. Mater. Vol. 8 (1996), p.1770.

[5] X.G. Li, S. Takahashi, K. Watanabe, Y. Kikuchi and M. Koishi: Nano Letters Vol. 1 (2001), p.475.

[6] M. Uda: Yousetu-Gakkai-Shi Vol 54 (1985), p.318.

[7] X.G. Li, T. Murai, A. Chiba and S. Takahashi: J. Appl. Phy. Vol. 86 (1999), p.1867.

[8] T. Liu, Y.H. Leng and X.G. Li: Solid State Communications Vol. 125 (2003), p.391.

[9] M. Konuma: Magnetic Materials, Kogakutosyo Ltd., Tokyo, (1998).

[10] R.M. Bozorth, Ferromagnetism, D. Van Nostrand, New York, 1951, p.441.

[11] X. G. Li, A. Chiba, S. Takahashi: J. Magn. Magn. Mater. Vol. 170 (1997), p.209.

[12] S. Gangopadhyay, G.C. hadjipanayis, S.I. Shah, C.M. Sorensen, K.J. Klabunde, V. Papefthymiou, A. Kositikas: Phys. Rev. B Vol. 45 (1992), p.9778.

[13] A.H. Morrish, K. Haneda, P.J. Schurer: J. Phys. (Paris) Colloq. Vol. 37 (1967), p. C6-301.

[14] X.L. Dong: J. Magn. & Magn. Mater. Vol. 210 (2000), p.143.

[15] S. Gangopadhyay, G.C. hadjipanayis, S.I. Shah, C.M. Sorensen, K.J. Klabunde, V. Papefthymiou, A. Kositikas: J. Appl. Phys. Vol. 70 (1991), p.5888.

[16] T. Tanaka, N. Tamagawa: Jpn. J. Appl. Phys. Vol. 6 (1967), p.1096.

[17] A. Tasaki, M. Oda, S. Kashu, C. hayashi: IEEE Trans. Magn. Vol. 15 (1979), p.1540.

[18] I.W. Park, M. Yoon, Y.M. Kim, Y. Kim, H. Yoon, J.J. Song, V. Vokov and Y.J. Park: Solid state communications Vol. 44 (2003), p.385.

[19] G. Kataby, Yu. Koltypin, A. Ulman, I. Felner, A. Gedanken: Applied Surface Science Vol. 201 (2002), p.191.

DOI: 10.1016/s0169-4332(02)00895-4

[20] S.N. Kaul: Phys. Rev. Vol. 24 (1981), p.6550.