用He ~+辐照调节全垂直自旋阀的磁动力学性质
Tuning the magnetodynamic properties of all-perpendicular spin valves using He+ irradiation
摘要：
使用He+离子辐照，我们演示了如何在所有垂直的[Co/Pd]/Cu/[Co/Ni]自旋阀的两个铁磁层的磁动力学性质可以通过改变He+离子注量进行调谐。由于两层的垂直磁各向异性通过照射逐渐减小，所以可以实现从全垂直到正交到全面内的不同磁配置。此外，磁阻尼和Co/Ni层的不均匀加宽都随着注量的增加而显著改善。自旋阀的GMR受到负面影响，在最大注量为50*10^14 He+/cm ^2时，GMR从初始值1.14%线性下降到0.4%。
英文摘要：
Using He+ ion irradiation, we demonstrate how the magnetodynamic properties of both ferromagnetic layers in all-perpendicular [Co/Pd]/Cu/[Co/Ni] spin valves can be tuned by varying the He+ ion fluence. As the perpendicular magnetic anisotropy of both layers is gradually reduced by the irradiation, different magnetic configurations can be achieved from all-perpendicular, through orthogonal, to all in-plane. In addition, both the magnetic damping and the inhomogeneous broadening of the Co/Ni layer improve substantially with increasing fluence. GMR of the spin valve is negatively affected and decreases linearly from an original value of 1.14% to 0.4% at the maximum fluence of 50*10^14 He+/cm^2.
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