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Electron Beam Tuning of the Magnetic Anisotropy in Co/Cu(110) Films

机译:Co / Cu(110)薄膜中磁各向异性的电子束调谐

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摘要

The 90$^{circ}$ in-plane spin reorientation transition caused by residual gas adsorption in the Co/Cu(110) system has been investigated using Mott electron polarimetry. The system displays a 3-D growth mode, forming islands with a preferential axis of elongation along the [1–10] direction. The adsorption of CO at the step edges is found to change the net anisotropy of the system and bring about the change in the relaxed magnetization direction. By carefully limiting the duration of electron beam exposure, it has been shown that this spin rotation can also be observed using Mott polarimetry, where it manifests itself as variations in the secondary electron spin polarization. Extended exposure of the switched film to an electron beam can reverse the easy axis direction, allowing local tuning of the magnetic anisotropy in this system.
机译:使用Mott电子极化技术研究了由Co / Cu(110)系统中残留气体吸附引起的90°平面内自旋重取向转变。系统显示3-D生长模式,形成沿[1-10]方向具有优先伸长轴的岛。发现在台阶边缘处CO的吸附改变了系统的净各向异性,并引起了松弛磁化方向的变化。通过仔细限制电子束曝光的持续时间,已显示出这种自旋旋转也可以使用莫特极化法观察到,其中它表现为二次电子自旋极化的变化。转换膜长时间暴露于电子束中可以使易轴方向反转,从而可以在此系统中局部调整磁各向异性。

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