Origin of the magnetic anisotropy induced by stress annealing in Fe-based nanocrystalline alloy

Ohnuma, M.; Hono, K.; Yanai, T.; Nakano, M.; Fukunaga, H.; Yoshizawa, Y.
April 2005
Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p152513
Academic Journal
The dependence of the structural anisotropy of Fe-Si-B-Nb-Cu alloy on the applied stress during annealing has been studied by transmission x-ray diffraction. After crystallizing under stress, the Fe-Si nanocrystals show anisotropy in the lattice spacing of the (620) planes. Their elongations are proportional to the applied stress and show a linear correlation with the magnetic anisotropy energy, Ku. These results indicate that Ku originates from a magnetoelastic effect due to an elastic elongation of the Fe-Si phase constrained by the surrounding amorphous phase.


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