Structure and Magnetic Properties of Cu Doped MnAl
H. X. Wang, P. Z. Si, W. Jiang, X. F. Xiao, J. G. Lee, C. J. Choi, M. Zhong, Z. F. Li, H. L. Ge
Physical Science International Journal · pp. 536–541 · Published 23 Dec 2013
10.9734/PSIJ/2014/5326Abstract
The effects of Cu-doping and heat-treatment on the structure and magnetic properties of ô-MnAl have been investigated. Copper stabilizes the structure of ô-MnAl and enhances the fraction of ô-phase while excess Cu (≥9 atm%) results in the formation of more ã- and/or â-phase. In comparison with the binary Mn-Al system, the Cu-doped ternary alloy is more insensitive to heat-treatment in structural transformation. Cu-doping usually decreases the saturation magnetization while a certain amount of Cu enhances the coercivity of the samples. The annealing time and temperature have a substantial effect on the magnetic properties of MnAl.
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