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Spin-orbit-torque magnetic random access memory (SOT-MRAM) is a promising technology for the next generation of data storage devices. The main bottleneck of this technology is the high reversal current density threshold. This outstanding…

介观与纳米尺度物理 · 物理学 2018-04-25 Yin Zhang , H. Y. Yuan , X. S. Wang , X. R. Wang

We report on the current-induced magnetization switching of a three-terminal perpendicular magnetic tunnel junction by spin-orbit torque and the read-out using the tunnelling magnetoresistance (TMR) effect. The device is composed of a…

Superparamagnetic tunnel junctions (sMTJs) are emerging as promising components for stochastic units in neuromorphic computing, owing to their tunable random switching behavior. Conventional MTJ control methods, such as spin-transfer torque…

Combining spin-orbit (SOT) and spin-transfer torques (STT) provides a practical approach for field-free switching in spin-orbit torque magnetic random-access memory (SOT-MRAM), a prerequisite for industrial deployment, but can compromise…

介观与纳米尺度物理 · 物理学 2026-05-27 Kuldeep Ray , Jérémie Vigier , Sylvain Martin , Chloé Bouard , Nicolas Lefoulon , Marc Drouard , Gilles Gaudin

Spin-orbit torques (SOTs) are widely used to control magnetization in nanoscale electric systems and are typically assumed to drive skyrmion nucleation and motion in a deterministic manner, especially in materials with strong…

Topological insulators (TI) and magnetic topological insulators (MTI) can apply highly efficient spin-orbit torque (SOT) and manipulate the magnetization with their unique topological surface states with ultra-high efficiency. Here, we…

Perpendicularly magnetized structures that are switchable using a spin current under field-free conditions can potentially be applied in spin-orbit torque magnetic random-access memory(SOT-MRAM).Several structures have been…

Exploiting current-induced spin-orbit torques (SOTs) to manipulate the magnetic state of dipolar-coupled nanomagnet systems with in-plane magnetic anisotropy, such as artificial spin ices, provides a route to local,…

介观与纳米尺度物理 · 物理学 2026-01-26 A. Pac , G. M. Macauley , J. A. Brock , A. Hrabec , A. Kurenkov , V. Raposo , E. Martinez , L. J. Heyderman

Spin-based memories are attractive for their non-volatility and high durability but provide modest resistance changes, whereas semiconductor logic transistors are capable of large resistance changes, but lack memory function with high…

The scaling of magnetic memory into nanometer size calls for a theoretical model to accurately predict the switching current. Previous models show large discrepancy with experiments in studying the spin-orbit torque switching of…

介观与纳米尺度物理 · 物理学 2024-08-27 Xue Zhang , Zhengde Xu , Zhifeng Zhu

Spin-orbit torque (SOT) enables efficient electrical control of magnetization, offering a pathway towards low-power spintronic devices. Magnetic topological insulators (TIs), with spin-momentum-locked surface states and intrinsic…

介观与纳米尺度物理 · 物理学 2026-05-21 Ling-Jie Zhou , Deyi Zhuo , Han Tay , Zi-Jie Yan , Pu Xiao , Xiaoda Liu , Bomin Zhang , Cui-Zu Chang

Spin-orbit torque (SOT)-based perpendicularly magnetized memory devices with multistate memory have garnered significant interest due to their applicability in low-power in-memory analog computing. However, current methods are hindered by…

介观与纳米尺度物理 · 物理学 2024-10-08 Raghvendra Posti , Chirag Kalouni , Dhananjay K Tiwari , Debangsu Roy

MXenes have attracted considerable attention in recent years owing to their two-dimensional (2D) layered structures with various functionalities similar to those of graphene and transition metal dichalcogenides. To open a new application…

介观与纳米尺度物理 · 物理学 2025-05-22 Prabhat Kumar , Yoshio Miura , Yoshinori Kotani , Akiho Sumiyoshiya , Tetsuya Nakamura , Gaurav K. Shukla , Shinji Isogami

Magnetic tunnel junctions (MTJs) are key components of spintronic devices, such as magnetic random-access memories. Normally, MTJs consist of two ferromagnetic (FM) electrodes separated by an insulating barrier layer. Their key functional…

材料科学 · 物理学 2024-09-06 Kartik Samanta , Yuan-Yuan Jiang , Tula R. Paudel , Ding-Fu Shao , Evgeny Y. Tsymbal

In the past few years the phenomenon of spin dependent tunneling (SDT) in magnetic tunnel junctions (MTJs) has aroused enormous interest and has developed into a vigorous field of research. The large tunneling magnetoresistance (TMR)…

Efficient generation of spin-orbit torques (SOTs) is central for the exciting field of spin-orbitronics. Platinum, the archetypal spin Hall material, has the potential to be an outstanding provider for spin-orbit torques due to its giant…

介观与纳米尺度物理 · 物理学 2021-08-17 Lijun Zhu , Daniel C. Ralph , Robert A Buhrman

Deterministic current-induced spin-orbit torque (SOT) switching of magnetization in a heavy transition metal/ferromagnetic metal/oxide magnetic heterostructure with the ferromagnetic layer being perpendicularly-magnetized typically requires…

A non-volatile SRAM cell is proposed for low power applications using Spin Transfer Torque-Magnetic Tunnel Junction (STT-MTJ) devices. This novel cell offers non-volatile storage, thus allowing selected blocks of SRAM to be switched off…

硬件体系结构 · 计算机科学 2019-10-11 Kanika Monga , Akul Malhotra , Nitin Chaturvedi , S. Gurunayaranan

While current-induced bistate spin-orbit torque (SOT) switching has been well established, deterministic electrical control of multiple magnetic states remains a central challenge in spintronics. Here, we realize a conceptually new…

介观与纳米尺度物理 · 物理学 2026-03-13 Fei Ye , Chunzheng Wang , Xue Zhang , Sihai Jiao , Zhongjie Wang , Long Cheng , Zhifeng Zhu , Chunlei Gao , Xiaofang Zhai

Spin-orbit torque (SOT) magnetoresistance (MR) devices have attracted attention for use in next-generation MR devices. The SOT devices are known to exhibit different write properties based on the relative angle between the magnetization…

介观与纳米尺度物理 · 物理学 2021-01-11 Yohei Shiokawa , Eiji Komura , Yugo Ishitani , Atsushi Tsumita , Keita Suda , Kosuke Hamanaka , Tomohiro Taniguchi , Tomoyuki Sasaki