OJM  Vol.1 No.2 , August 2011
Structural Stabilizing Effect of Zn Substitution on MnAl and Its Magnetic Properties
The effect of Zn substitution on the structure and magnetic properties of τ-MnAl has been investigated sys-tematically. It is found that Zn substitution can stabilize the structure of τ-phase and thus a significant amount of τ-phase can be produced. Zn increases the coercivity and saturation magnetization of the τ-MnAl but reduces the Currie temperature. However, excess Zn is detrimental to the magnetic parameters. The optimum magnetic performance was found in samples with Zn substitution to 2.9% Mn atoms and 3.5% Al atoms, respectively.

Cite this paper
nullH. Wang, P. Si, W. Jiang, J. Lee, C. Choi, J. Liu, Q. Wu, M. Zhong and H. Ge, "Structural Stabilizing Effect of Zn Substitution on MnAl and Its Magnetic Properties," Open Journal of Microphysics, Vol. 1 No. 2, 2011, pp. 19-22. doi: 10.4236/ojm.2011.12003.
[1]   H. Kono, “On the Ferromagnetic Phase in Manganese-Aluminum System,” Journal of the Physical Society of Japan, Vol. 13, No. 12, 1958, pp. 1444-1451.

[2]   Q. Zeng, I. Baker, J. B. Cui and Z. C. Yan, “Structural and Magnetic Properties of Nanostructured Mn-Al-C Magnetic Materials,” Journal of Magnetism and Magnetic Materials, Vol. 308, No. 2, 2007, pp. 214-226.

[3]   J. H. Park, Y. K. Hong, S. Bae, J. J. Lee, J. Jalli, G. S. Abo, N. Neveu, S. G. Kim, C. J. Choi and J. G. Lee, “Saturation Magnetization and Crystalline Anisotropy Calculations for MnAl Permanent Magnet,” Journal of Applied Physics, Vol. 107, No. 9, 2010, pp. 09A731.

[4]   Y. Kurtulus and R. Dronskowski, “Electronic Structure, Chemical Bonding, and Spin Polarization in Ferromagnetic MnAl,” Journal of Solid State Chemistry, Vol. 176, No. 2, 2003, pp. 390-399. doi:10.1016/S0022-4596(03)00242-1

[5]   Y. Sakka, M. Nakamura and K. Koshimoto, “Rapid Quenching and Properties of Hard Magnetic Materials in MnAl-X (X=Ti, Cu, Ni, C, B) Systems,” Journal of Materials Science, Vol. 24, No. 12, 1989, PP. 4331-4338

[6]   W. H. Dreizler and A. Menth, “Transformation Kinetics of the Ferromagnetic Alloy Mn-Al-C,” IEEE Transactions on Magnetics, Vol. 16, No. 3, 1980, PP. 534-536.

[7]   D. C. Crew, P. G. McCormick and R. Street, “MnAl and MnAlC Permanent Magnets Produced by Mechanical Alloying,” Scripta Metallurgica et Materialia, Vol. 32, No. 3, 1995, PP. 315-318.

[8]   M. Mat, A. Mor and N. Koh, “Crystal Structure and Magnetic Properties of Mn-Al-Ni Ferromagnetic Films,” IEEE Translation Journal on Magnetics in Japan, Vol. 6, No. 2, 1991, pp. 134-140 doi:10.1109/TJMJ.1991.4565123

[9]   R. Kainuma, M. Ise, K. Ishikawa, I. Ohnuma and K. Ishida, “Phase Equilibria and Stability of the B2 Phase in the Ni–Mn–Al and Co–Mn–Al systems,” Journal of Alloys and Compounds, Vol. 269, 1998, pp. 173-180. doi:10.1016/S0925-8388(98)00127-3