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Hetero-amorphous Fe-Co-B-C soft magnetic thin films with uniaxial magnetic anisotropy and large magnetostriction

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3 Author(s)
Tomita, Hiroshi ; Mater. & Devices Dev. Center, Toshiba Corp., Kawasaki, Japan ; Inoue, Tetsuo ; Mizoguchi, T.

Hetero-amorphous (Fe0.75Co0.25)1-x(B1-yC y)x films have been obtained by RF magnetron sputtering. Magnetic properties strongly depended on the hetero-amorphous substructure of the films. The film with a fine substructure less than 10 nm in mean diameter exhibited low coercive force of 40 A/m along the hard axis, large spontaneous magnetization of 1.6 T, and in-plane anisotropy field of 1.2 kA/m induced by field-annealing although the film had a large magnetostriction constant of 39×10-6

Published in:

Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 5 )