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arXiv 1708.07682cond-mat.mtrl-sci
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NiO反铁磁矩的自旋矩控制

Spin torque control of antiferromagnetic moments in NiO

Takahiro Moriyama, Kent Oda, Teruo Ono

摘要:

长期以来,一直没有有效的方法来控制反铁磁体。由于高分子场和小的磁化率,需要相当强的磁场来操纵磁矩。由于净磁矩实际上为零,因此也难以检测磁矩的取向。由于这些原因,反铁磁体的研究进展不如铁磁体,这是现代自旋电子器件的主要材料。在这里,我们表明,在NiO,一个典型的天然反铁磁体的磁矩,确实可以控制的自旋扭矩与一个相对较小的电流密度(~5 × 10^7 A/cm ^2)和他们的取向是由自旋霍尔磁阻产生的横向电阻检测。所展示的控制和探测反铁磁的技术将极大地促进新近兴起的“反铁磁自旋电子学”的方法学发展。此外,我们的研究结果基本上导致自旋力矩反铁磁存储器。

英文摘要:

For a long time, there have been no efficient ways of controlling antiferromagnets. Quite a strong magnetic field was required to manipulate the magnetic moments because of a high molecular field and a small magnetic susceptibility. It was also difficult to detect the orientation of the magnetic moments since the net magnetic moment is effectively zero. For these reasons, research on antiferromagnets has not been progressed as drastically as that on ferromagnets which are the main materials in modern spintronic devices. Here we show that the magnetic moments in NiO, a typical natural antiferromagnet, can indeed be controlled by the spin torque with a relatively small electric current density (~5 x 10^7 A/cm^2) and their orientation is detected by the transverse resistance resulting from the spin Hall magnetoresistance . The demonstrated techniques of controlling and detecting antiferromagnets would outstandingly promote the methodologies in the recently emerged "antiferromagnetic spintronics". Furthermore, our results essentially lead to a spin torque antiferromagnetic memory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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