Mechanically Driven Alloying and Magnetic Properties in Immiscible Mn₈₀Bi₂₀ Nanocrystalline Powders

Abstract:

The paper has described the formation of nanocrystalline Mn₈₀Bi₂₀ powders by mechanical alloying and studied the changes of structure and magnetic properties of the powders during the process of ball milling by using X-ray diffraction and saturation magnetization σ_s measurements. The solid solubility of bismuth in manganese increases with milling time and tends to a stable value after 80h milling. The σ_s of Mn₈₀Bi₂₀ increases abruptly with milling time at the early stage and begins to decrease after 15h. At the time of 15h, the σ_s reaches a maximum, which is about 7Am²/kg. The result shows an interesting information that the antiferromagnetic Mn and the diamagnetic Bi produce ferromagnetic Mn₈₀Bi₂₀ in process of mechanical alloying.

• Periodical: Advanced Materials Research (Volume 873)
• Pages: 217-220
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.873.217
• Online since: December 2013
• Authors: Min Xu*, Qun Jiao Wang
• Keywords: Immiscible System, Magnetic Property, Mechanical Alloying, Nanocrystalline, Structure

References

[1] W.L. Johnson: Prog. Mater. Sci., Vol. 30 (1986), p.81.

[2] T. Fukunaga, M. Mori, K. Inou and U. Mizutani: Mater. Sci. Eng. A, Vol. 134 (1991), p.863.

[3] S.N. Alam: Mater. Sci. Eng. A, Vol. 433 (2006), p.161.

[4] T. Raghu, R. Sundaresan, P. Ramakrishnan and T.R. Rama Mohan: Mater. Sci. Eng. A, Vol. 304-306 (2001), p.438.

[5] E. Gaffet, C. Louison, M. Harmelin and F. Faudet: Mater. Sci. Eng. A, Vol. 134 (1991), p.1410.

[6] F. Delogu: Acta Mater., Vol. 56 (2008), p.2344.

[7] C.H. Lee and S.H. Lee: J Nanosci Nanotechnol., Vol. 11 (2007), p.4057.

[8] C. Aguilar, V. de P. Martinez, J.M. Palacios, S. Ordoñez and O. Pavez: Scripta Mater., Vol. 57 (2007), p.213.

[9] E.P. Yelsukov, G.A. Dorofeev, A.L. Ulyanov: Czechoslovak J. Phys., Vol. 55(2005), p.913.

[10] C. Suryanarayana: Prog. Mater. Sci., Vol. 46 (2001), p.1.

[11] P. Crespo, A. Hernando, R. Yavari et al: Phys. Rev. B, Vol. 48 (1993), p.7134.

[12] P. A. Serena and N. Garcia: J. Appl. Phys. Vol. 75 (1994) No. 10, p.6580.

[13] A.R. Yavari and P.J. Desre, in A.R. Yavari (ed. ): Proc. Ordering and disordering in Alloys (Elsevier, U.K. 1992), p.414.

DOI: 10.1007/978-94-011-2886-5_43

[14] K. Uenishi, K.F. Kobayashi, S. Nasu, H. Hatano, K.N. Ishihara and P.H. Shingu: Z. Metallk, Vol. 83 (1992), p.132.

[15] A.R. Yavari and P.J. Desre and T. Benameur: Phys. Rev. Lett., Vol. 68 (1991), p.2235.

[16] O. Drbohlav and A.R. Yavari: Acta Metall. Mater., Vol. 43 (1995), p.1799.

[17] W. Heisenberg: Z. Physik, Vol. 49 (1928), p.619.

[18] K. Hoselitz: Ferromagnetic Properties of Metals and Alloys (Oxford Clarendon Press, U.K. 1952), p.3.

[19] R.M. Bozorth, Ferromagnetism (D. Van Nostrand Company, U.S. 1956), p.443.