中国科学技术大学自旋电子材料与器件实验室--自旋电子材料与器件实验室-- P. Li, J. Kally, S. Zhang, T. Pillsbury, J. Ding, et al. Magnetization Switching Using Topological Surface State

论文成果

当前位置: 自旋电子材料与器件实验室 -- 论文成果

P. Li, J. Kally, S. Zhang, T. Pillsbury, J. Ding, et al. Magnetization Switching Using Topological Surface State

发布时间：2024-04-23点击次数：

DOI码：
10.1126/sciadv.aaw341
发表刊物：
Sci. Adv.
摘要：
Topological surface states (TSSs) in a topological insulator are expected to be able to produce a spin-orbit torque that can switch a neighboring ferromagnet. This effect may be absent if the ferromagnet is conductive because it can completely suppress the TSSs, but it should be present if the ferromagnet is insulating. This study reports TSS-induced switching in a bilayer consisting of a topological insulator Bi2Se3 and an insulating ferromagnet BaFe12O19. A charge current in Bi2Se3 can switch the magnetization in BaFe12O19 up and down. When the magnetization is switched by a field, a current in Bi2Se3 can reduce the switching field by ~4000 Oe. The switching efficiency at 3 K is 300 times higher than at room temperature; it is ~30 times higher than in Pt/BaFe12O19. These strong effects originate from the presence of more pronounced TSSs at low temperatures due to enhanced surface conductivity and reduced bulk conductivity.
论文类型：
期刊论文
卷号：
5
期号：
8
是否译文：
否
发表时间：
2019-08-30