Perpendicular Magnetic Anisotropy Preserved by Orbital Oscillation in Strained Tetragonal Fe4N/BiFeO3 Bilayers
作者： Li Yin , Xiaocha Wang , Wenbo Mi
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摘要: Orbital performances are important for inducing and manipulating the perpendicular magnetic anisotropy (PMA) in spintronic devices. Herewith, orbital-mediated PMA highly spin-polarized Fe4N investigated strained tetragonal Fe4N/BiFeO3(001) heterostructures with FeAFeB/Fe–O2 termination using first-principles calculations. Different from d2 = dxz + dyz dz2 favored previously reported Fe film, all atomic layers at biaxial strain of S, d orbitals (i.e., d1 dxy dx2–y2 d2) make contributions to S 0% in-plane (IMA) −2 2%. Specifically, d1–d2 orbital oscillation preserves (or favors) Fe4N, where stronger MAE contribution alternates between adjacent layers. However, 2%, whole shows IMA stable contributions. Moreover, unstrained can be transformed into by a −2% high spin pol...
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