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High coercivity and high saturation magnetization Mn-Al thin films

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3 Author(s)
Huang, J.H. ; Inst. of Mater. Sci. & Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Kuo, P.C. ; Shen, S.C.

Mn-Al thin films with the composition of 31-68 at.% Mn were prepared by rf magnetron sputtering at various substrate temperatures then annealed in vacuum. Effects of the chemical composition, substrate temperature and annealing temperature on the magnetic properties of Mn-Al films have been investigated. The analysis of X-ray diffraction and magnetic measurement indicate that τ-phase was synthesized at a composition range of 40-60 at.% Mn. However, the formation of large amount of τ-phase occurred for Mn50-Al50 films, which have a high coercivity up to about 3000 Oe and a fairly large saturation magnetization of about 420 emu/cc

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Magnetics, IEEE Transactions on  (Volume:31 ,  Issue: 5 )