Lee Soobeom, An Suhyeok, Baek Eunchong, Kim Dongryul, Cho Jaeyong, You Chun-Yeol
Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Republic of Korea.
Basic Science Research Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Republic of Korea.
Sci Adv. 2025 Mar 21;11(12):eadr0457. doi: 10.1126/sciadv.adr0457. Epub 2025 Mar 19.
With the advancement of magnetization-based spintronic applications, there has been considerable interest in spin-orbit torque as an electric technique to dynamically manipulate magnetization. In this study, gate-induced ON-OFF switchable spin-orbit torque in Pt/Co/Pt spin-orbit device using the ionic gating technique is reported. By canceling the spin currents from Pt layers, the OFF state is attained in Pt/Co/Pt spin-orbit device. Notably, under a strong negative gate electric field applied to the Pt/Co/Pt spin-orbit device, the damping-like spin-orbit torque is markedly enhanced over sixfold compared with the applied positive gate electric field. We show that the gate modulation of the spin-orbit torque in the Pt/Co/Pt spin-orbit device can be explained by considering the change of the spin-charge interconversion by electric gating. This research serves as a promising avenue for electrically programmable spintronic devices.
随着基于磁化的自旋电子学应用的发展，自旋轨道扭矩作为一种动态操纵磁化的电学技术引起了广泛关注。在本研究中，报道了使用离子门控技术在Pt/Co/Pt自旋轨道器件中实现栅极诱导的开-关可切换自旋轨道扭矩。通过消除来自Pt层的自旋电流，在Pt/Co/Pt自旋轨道器件中实现了关断状态。值得注意的是，在施加到Pt/Co/Pt自旋轨道器件的强负栅极电场下，与施加正栅极电场相比，类阻尼自旋轨道扭矩显著增强了六倍以上。我们表明，通过考虑电门控引起的自旋-电荷相互转换的变化，可以解释Pt/Co/Pt自旋轨道器件中自旋轨道扭矩的栅极调制。这项研究为电可编程自旋电子器件提供了一条有前景的途径。
