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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Efficient thermal spin injection in metallic nanostructures
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Efficient thermal spin injection in metallic nanostructures

机译：高效的金属纳米结构热旋转注射液

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摘要

Thermal spin injection is a unique and fascinating method for generating spin current. If magnetization can be controlled by thermal spin injection, various advantages will be provided in spintronic devices, through its wireless controllability. However, the generation efficiency of thermal spin injection is believed to be lower than that of electrical spin injection. Here, we explore a suitable ferromagnetic metal for an efficient thermal spin injection, via systematic experiments based on diffusive spin transport under temperature gradients. Since a ferromagnetic metal with strong spin splitting is expected to have a large spin-dependent Seebeck coefficient, a lateral spin valve based on CoFe electrodes has been fabricated. However, the superior thermal spin injection property has not been observed, because the CoFe electrode retained its crystalline signature-where s-like electrons dominate the transport property in the ferromagnet. To suppress the crystalline signature, we adopt a CoFeAl electrode, in which the Al impurity significantly reduces the contribution from s-like electrons. Highly efficient thermal spin injection has been demonstrated using this CoFeAl electrode. Further optimization for thermal spin injection has been demonstrated by adjusting the Co and Fe composition.
机译：热自旋注射是一种用于产生旋转电流的独特令人振奋的方法。如果可以通过热旋转注射控制磁化，则通过其无线可控性地将在闪光装置中提供各种优点。然而，认为热旋转注射喷射的产生效率低于电自旋注射的产生效率。在这里，我们探讨了一种合适的铁磁性金属，用于高效的热旋转注射，通过基于温度梯度的扩散旋转输送的系统实验。由于预期具有强旋转分裂的铁磁金属具有大的旋转围绕系数，因此制造了基于CoFe电极的横向旋转阀。然而，尚未观察到卓越的热旋转注射性能，因为CoFe电极保留其结晶签名 - 其中S样电子在铁磁性中占据了运输特性。为了抑制结晶签名，我们采用具有纤薄电极，其中Al杂质显着降低了S样电子的贡献。使用该胶质电极证明了高效的热旋转注射。通过调节CO和Fe组合物证明了热旋转注射的进一步优化。

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