Abstract

Abstract The origin of high anisotropy field H k and low coercivity H c of Fe–Co–B/Ni–Fe double layered film with high 4 πM s was investigated. In-plane and out-of-plane XRD studies clarified that the lattice spacing of planes along the easy axis direction was expanded than that along the hard axis direction. The fact was confirmed that such stress caused by the lattice expansion had significant effects on the magnetoelastic energy in this double layer.

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