Two‐Dimensional Cr <sub>3</sub> Te <sub>4</sub> /WS <sub>2</sub> /Fe <sub>3</sub> GeTe <sub>2</sub> /WTe <sub>2</sub> Magnetic Memory with Field‐Free Switching and Low Power Consumption
Abstract
Abstract Spin‐orbit torque (SOT) magnetic memory technology has garnered significant attention due to its ability to enable field‐free switching of magnets with strong perpendicular magnetic anisotropy (PMA). However, concerns regarding power consumption of SOT‐memory are persisting. Here, this work proposes a method to construct magnetic tunnel junction (MTJ) by transferring chemically vapor‐deposited two‐dimensional (2D) Cr 3 Te 4 /WS 2 van der Waals (vdW) heterostructures onto 2D Fe 3 GeTe 2 (FGT) magnet. The robustness and tunability of 2D magnets allow MTJs to exhibit non‐volatility, multiple output states, and impressive cycling durability. MTJs with thin WS 2 barriers (fewer than six layers) exhibit a linear tunneling effect, achieving a low resistance‐area product (RA) of 15.5 kΩ·µm 2 using bilayer WS 2 , which facilitats low‐power operation. Furthermore, the different 2D magnets display a significant anti‐parallel window of up to 8 kOe. SOT‐memory based on the typical MTJ demonstrates a low write consumption of 0.3 mJ and read consumption of 9.7 nJ, marking a significant advancement in 2D vdW SOT‐memory. This research has pointed out a new direction for constructing low power consumption SOT‐memory with PMA field‐free switching.
Article Details
Authors (24)
Kun He
Bailing Li
Jianhang Nie
Department of Applied Physics, School of Physics and Electronics, Hunan University 1 , Changsha 410082,
Yanglong Hou
School of Materials
Changmeng Huan
Chip Manufacturing Department Hunan Sanan Semiconductor Co., Ltd. Changsha 410082 China
Min Hong
Centre for Future Materials, School of Science, Engineering and Digital Technologies
Jiantao Du
School of Materials Science and Engineering Beihang University Beijing 100191 China
Yang Chen
Jingmei Tang
Chen Yi
Ya Feng
Shaojun Liu
Sumei Wu
School of Materials Science and Engineering, Dalian Jiaotong University 1 , Dalian 116028,
Miaomiao Liu
Hongmei Zhang
Yukun Guo
State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China
Ruixia Wu
Jia Li
Xingqiang Liu
Yuan Liu
Zhongming Wei
Lei Liao
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Bo Li
Xidong Duan