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Magnetic exchange forces and d-state filling: Antiferromagnetic MnO(001) and NiO(001) surfaces

机译:磁交换力和d态填充:反铁磁MnO(001)和NiO(001)表面

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摘要

Magnetic exchange force microscopy (MExFM) is one of the most important methods to investigate the spin structure of magnetic surfaces. However, a deep understanding of the measured spin contrast and the spin-dependent forces is missing. For the prototypical antiferromagnetic MnO(001) and NiO(001) surfaces probed by ferromagnetic Fe tips we demonstrate by means of spin-polarized density functional theory that the differences in the tip-surface interaction are due to the distance-dependent occupation of the transition-metal 3d states. While agreement is achieved with recent MExFM measurements of NiO(001), we predict opposite spin-contrast for MnO(001).
机译:磁交换力显微镜(MExFM)是研究磁性表面自旋结构的最重要方法之一。但是,缺少对所测量的自旋对比度和自旋相关力的深入了解。对于铁磁Fe尖端探测的典型反铁磁性MnO(001)和NiO(001)表面,我们通过自旋极化密度泛函理论证明了尖端表面相互作用的差异是由于过渡的距离依赖占据金属3d状态。尽管最近对NiO(001)的MExFM测量已达成共识,但我们预测MnO(001)的自旋相反。

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