Interfacial Control via Reversible Ionic Motion in Battery-Like Magnetic Tunnel Junctions,Advanced Electronic Materials

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Interfacial Control via Reversible Ionic Motion in Battery-Like Magnetic Tunnel Junctions
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2021-08-08 , DOI: 10.1002/aelm.202100512
Guofei Long ₁ , Qian Xue _{1,

2} , Qiang Li _{1,

2} , Yu Shi ₁ , Lin Li ₁ , Long Cheng ₁ , Peng Li ₁ , Junwei Zhang ₃ , Xixiang Zhang ₃ , Haizhong Guo ₄ , Jing Fu ₅ , Shandong Li ₂ , Jagadeesh S. Moodera ₆ , Guo‐Xing Miao _{1,

2,

6}

Affiliation

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/FeCoO_x/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.

中文翻译：

通过类电池磁性隧道结中的可逆离子运动进行界面控制

接口上的电气控制是在现代电子设备中获取高级功能的关键方法之一。在这项工作中，提出并证明了“电池状”隧道结结构可以通过可逆的锂离子运动嵌入附加的控制和功能。在 FeCo/FeCoO _x的模型系统中/LiF/FeCo 磁性隧道结，超薄 LiF 势垒在适度的施加电压下可以产生强电场，因此可以电驱动势垒内的可逆锂离子迁移。离子运动随后会导致可逆的界面改变，从而在整个设备上产生超过 1000% 的电阻变化。同时，作为界面控制的函数，相当大的隧道磁阻持续存在，甚至反转自旋极化的符号。因此，这些设备对电场和磁场的操作都做出响应，从而产生多种非易失性功能。

更新日期：2021-09-10

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