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Tunnel magneto-Seebeck effect

机译:隧道磁化 - 塞贝克效应

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摘要

The interplay of charge, spin and heat transport is investigated in the fascinating research field of spin caloritronics, the marriage of spintronics and thermoelectrics. Here, many new spin-dependent thermal transport phenomena in magnetic nanostructures have been explored in the recent years. One of them is the tunnel magneto-Seebeck (TMS) effect in magnetic tunnel junctions (MTJs) that has large potential for future nanoelectronic devices, such as nanostructured sensors for three-dimensional thermal gradients, or scanning tunneling microscopes driven by temperature differences. The TMS describes the dependence of the MTJ's thermopower on its magnetic configuration when a thermal gradient is applied. In this review, we highlight the successes from the first observation of the TMS in 2011 to the current ongoing developments in this research area. We emphasize the different heating techniques, material designs, applications and additional physical aspects such as the role of the thermal conductivity of the barrier material. We further demonstrate the efficient interplay between ab initio calculations and experiments within this field, as this has led, e.g. to the detection of large TMS ratios in MTJs with half-metallic Heusler electrodes.
机译:在旋转升降机的迷人研究领域,闪蒸和热电的婚姻中研究了电荷,旋转和热传输的相互作用。在这里,近年来探讨了磁性纳米结构中的许多新的旋转依赖热传输现象。其中一个是磁隧道结(MTJ)中的隧道磁化 - 塞贝克(TMS)效应,其具有未来纳米电子器件的潜力大,例如用于三维热梯度的纳米结构传感器,或扫描由温度差异驱动的隧道显微镜。当施加热梯度时,TMS描述了MTJ的热电机对其磁构造的依赖性。在这篇综述中,我们突出了2011年首次观察TMS的成功,以至于本研究领域的当前正在进行的发展。我们强调不同的加热技术,材料设计,应用和额外的物理方面,例如阻挡材料的导热率的作用。我们进一步展示了AB Initio计算与实验中的实验之间的有效相互作用,因为这是LED,例如LED。在MTJ中检测半金属HEUSLER电极的大型TMS比。

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