Interfacial Control via Reversible Ionic Motion in Battery‐Like Magnetic Tunnel Junctions
Abstract
Electrical control on interfaces is one of the key approaches to harvest advanced functionalities in modern electronic devices. In this work, it is proposed and demonstrated that a “battery‐like” tunnel junction structure can be embedded with added control and functionalities via reversible lithium‐ion motion. In a model system of FeCo/FeCoOx/LiF/FeCo magnetic tunnel junctions, the ultrathin LiF barrier makes strong electric fields possible under moderate applied voltages, and can therefore electrically drive reversible lithium‐ion migration within the barrier. The ion motion subsequently leads to reversible interfacial modifications that generates over a thousand percent resistance change across the devices. Meanwhile, sizable tunneling magnetoresistance persists and even reverses the sign of spin polarization as a function of the interfacial control. The devices are therefore responsive to both electric and magnetic field manipulations, giving rise to diverse and nonvolatile functionalities.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 08, 2021
- Source ID
- 10.1002/aelm.202100512
Entities
People
- Guo-Xing Miao
- Guofei Long
- Haizhong Guo
- Jagadeesh Moodera
- Jing Fu
- Junwei Zhang
- Lin Li
- Long Cheng
- Peng Li
- Qian Xue
- Qiang Li
- Shandong Li
- Xixiang Zhang
- Yu Shi
Organizations
- Army Research Office
- Massachusetts Institute of Technology
- Ministry of Research and Innovation
- National Natural Science Foundation of China
- National Science Foundation
- Natural Sciences and Engineering Research Council
- Office of Naval Research
- Qingdao University
- Tongji University
- University of Waterloo
- Zhengzhou University