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自旋电子学指通过控制和利用电子自旋(而不是电荷)获得一系列新颖性能的研究领域。自旋电子器件已经成功地应用于计算机硬盘驱动器和磁性随机存储器,对IT行业的发展产生了深远的影响。这些应用都是基于自旋极化传输效应,即具有固定自旋取向的电子穿过磁性异质结所发生的相关效应。目前,在将微波和自旋极化传输联系起来的自旋器件中的自旋动力学研究,为研制尺寸远远小于微波波长的新型微波器件提供了巨大的潜能。在这篇综述中,首先简单地介绍了自旋器件的概念;接着研究了微波实验来研究自旋电子器件的微波辅助翻转和自旋泵浦现象。前者将能够开发出高密度的计算机硬盘,而后者,结合直接电子检测技术,将能够实现小型化的无源微波探测器。
Spintronics refers to the field of research that achieves a range of novel properties by controlling and utilizing electron spin rather than charge. Spintronics devices have been successfully applied to computer hard disk drives and magnetic random access memories and have had a profound impact on the development of the IT industry. These applications are all based on the spin-polarized transmission effect, the correlation effect of electrons having a fixed spin orientation that traverses the magnetic heterojunction. At present, the spin kinetics in spin devices that link microwaves to spin-polarized transmissions offers great potential for the development of new microwave devices that are much smaller than the wavelength of the microwave. In this review, we first briefly introduce the concept of spin devices. We then investigate the microwave-assisted flip and spin-pump phenomena of spintronic devices using microwave experiments. The former will be able to develop high-density computer hard drives, which, in combination with direct electronic detection, will enable miniaturized passive microwave detectors.