论文标题
当地焦耳退火的增强yig $ | $ pt旋转电导
Enhancement of YIG$|$Pt spin conductance by local Joule annealing
论文作者
论文摘要
我们报告说，焦耳加热可用于增强金属和氧化物之间的界面自旋电导率。我们观察到，通过注入较大的电流密度（$> 10^{12} \ text {a/m}^{2} $）中的局部将界面的当地退火，以pristine 7 \，nm厚的pt nanoStrip撤离，可以改善Yttrium Iron Garnet（Yig的兴趣），从而提高了一个率，从而提高了Yttrium Iron Garnet（Yig）的兴趣：A必须避免使用强大的化学蚀刻的超薄石榴石膜。该效果通过不同的方法证实：自旋霍尔磁磁性，自旋泵送和非本地旋转转运。我们使用它来研究Yig $ | $ pt耦合对非线性自旋传输特性的影响。我们发现，从线性到非线性自旋转运方案的跨界电流与这种耦合无关，这表明介电循环中的纯自旋电流的行为主要受PT纳米条旁边裸膜的物理特性的控制。
We report that Joule heating can be used to enhance the interfacial spin conductivity between a metal and an oxide. We observe that local annealing of the interface at about 550\,K by injecting large current densities ($>10^{12}\text{A/m}^{2}$) into a pristine 7\,nm thick Pt nanostrip evaporated on top of yttrium iron garnet (YIG), can improve the spin transmission up to a factor 3: a result of particular interest for interfacing ultra thin garnet films where strong chemical etching of the surface has to be avoided. The effect is confirmed by different methods: spin Hall magnetoresistance, spin pumping and non-local spin transport. We use it to study the influence of the YIG$|$Pt coupling on the non-linear spin transport properties. We find that the cross-over current from a linear to a non-linear spin transport regime is independent of this coupling, suggesting that the behavior of pure spin currents circulating in the dielectric are mostly governed by the physical properties of the bare YIG film beside the Pt nanostrip.
