Ferromagnetic to weak-magnetic transition accompanied by bcc to fcc transformation in Fe–Mn–Al alloy

Ando, K.; Omori, T.; Ohnuma, I.; Kainuma, R.; Ishida, K.
November 2009
Applied Physics Letters;11/23/2009, Vol. 95 Issue 21, p212504
Academic Journal
Magnetic properties and phase change in Fe-36 at. %Mn-15 at. %Al ternary alloy were investigated. Direct evidence of a ferromagnetic to weak-magnetic transition accompanied by martensitic transformation from the bcc-α (A2) phase to the fcc-γ′ (2M) phase was obtained, where the magnetic state of the parent and the martensite phases are ferromagnetic and weak-magnetic, respectively. The origin of this unique phase change is caused by the peculiar γ-loop of α/γ equilibrium formed in Fe–Mn–X (X: ferrite stabilizing element) system due to the magnetic effect.


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