Large Room-Temperature Magnetoresistance in van der Waals Ferromagnet/Semiconductor Junctions

Zhu, Wenkai; Xie, Shihong; Lin, Hailong; Zhang, Gaojie; Wu, Hao; Hu, Tiangui; Wang, Ziao; Zhang, Xiaomin; Xu, Jiahan; Wang, Yujing; Zheng, Yuanhui; Yan, Faguang; Zhang, Jing; Zhao, Lixia; Patanè, Amalia; Zhang, Jia; Chang, Haixin; Wang, Kaiyou

Abstract

A magnetic tunnel junction (MTJ) is the core component in memory technologies, such as the magnetic random-access memory, magnetic sensors and programmable logic devices. In particular, MTJs based on two-dimensional van der Waals (vdW) heterostructures offer unprecedented opportunities for low power consumption and miniaturization of spintronic devices. However, their operation at room temperature remains a challenge. Here, we report a large tunnel magnetoresistance (TMR) of up to 85% at room temperature (T = 300 K) in vdW MTJs based on a thin (< 10 nm) semiconductor spacer WSe2 layer embedded between two Fe3GaTe2 electrodes with intrinsic above-room-temperature ferromagnetism. The TMR in the MTJ increases with decreasing temperature up to 164% at T = 10 K. The demonstration of TMR in ultra-thin MTJs at room temperature opens a realistic and promising route for next-generation spintronic applications beyond the current state of the art.

Citation

Zhu, W., Xie, S., Lin, H., Zhang, G., Wu, H., Hu, T., …Wang, K. (2022). Large Room-Temperature Magnetoresistance in van der Waals Ferromagnet/Semiconductor Junctions. Chinese Physics Letters, 39(12), Article 128501. https://doi.org/10.1088/0256-307x/39/12/128501

• Journal Article Type: Article
• Acceptance Date: Nov 16, 2022
• Online Publication Date: Nov 17, 2022
• Publication Date: Nov 17, 2022
• Deposit Date: Nov 18, 2022
• Publicly Available Date: Nov 18, 2023
• Journal: Chinese Physics Letters
• Print ISSN: 0256-307X
• Electronic ISSN: 1741-3540
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 39
• Issue: 12
• Article Number: 128501
• DOI: https://doi.org/10.1088/0256-307x/39/12/128501
• Keywords: General Physics and Astronomy
• Public URL: https://nottingham-repository.worktribe.com/output/13752816
• Publisher URL: https://iopscience.iop.org/article/10.1088/0256-307X/39/12/128501