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Analog electronic non-volatile memories mimicking synaptic operations are being explored for the implementation of neuromorphic computing systems. Compound synapses consisting of ensembles of stochastic binary elements are alternatives to…

Applied Physics · Physics 2019-10-02 Vaibhav Ostwal , Ramtin Zand , Ronald DeMara , Joerg Appenzeller

Current-induced spin-orbit torques (SOTs) enable fast and efficient manipulation of the magnetic state of magnetic tunnel junctions (MTJs), making it attractive for memory, in-memory computing, and logic applications. However, the…

Future applications of spin-orbit torque will require new mechanisms to improve the efficiency for switching nanoscale magnetic tunnel junctions (MTJs), while also controlling the magnetic dynamics to achieve fast, nanosecond scale…

Mesoscale and Nanoscale Physics · Physics 2018-02-07 Shengjie Shi , Yongxi Ou , S. V. Aradhya , D. C. Ralph , R. A. Buhrman

This study reports the magnetization switching induced by spin-orbit torque (SOT) from the spin current generated in Co2MnGa magnetic Weyl semimetal (WSM) thin films. We deposited epitaxial Co2MnGa thin films with highly B2-ordered…

Materials Science · Physics 2021-02-09 Ke Tang , Zhenchao Wen , Yong-Chang Lau , Hiroaki Sukegawa , Takeshi Seki , Seiji Mitani

Current induced spin-orbit magnetic fields (iSOFs), arising either in single-crystalline ferromagnets with broken inversion symmetry1,2 or in non-magnetic metal/ferromagnetic metal bilayers3,4, can produce spin-orbit torques which act on a…

Mesoscale and Nanoscale Physics · Physics 2018-04-27 L. Chen , M. Gmitra , M. Vogel , R. Islinger , M. Kronseder , D. Schuh , D. Bougeard , J. Fabian , D. Weiss , C. H. Back

Spintronic neurons which emit sharp voltage spikes are required for the realization of hardware neural networks enabling fast data processing with low-power consumption. In many neuroscience and computer science models, neurons are…

Disordered Systems and Neural Networks · Physics 2019-05-08 Rie Matsumoto , Steven Lequeux , Hiroshi Imamura , Julie Grollier

We present artificial neural network design using spin devices that achieves ultra low voltage operation, low power consumption, high speed, and high integration density. We employ spin torque switched nano-magnets for modelling neuron and…

Disordered Systems and Neural Networks · Physics 2012-08-16 Mrigank Sharad , Charles Augustine , Georgios Panagopoulos , Kaushik Roy

Current induced spin-orbit torques driven by the conventional spin Hall effect are widely used to manipulate the magnetization. This approach, however, is nondeterministic and inefficient for the switching of magnets with perpendicular…

Electric field induced spin-orbit torques are the crucial mechanism for electric regulations of antiferromagnetic order. However, the spin-orbit torques in antiferromagnets and the induced spin dynamics remain largely unexplored. In this…

Materials Science · Physics 2025-12-12 Yizhuo Song , Jianting Dong , Jiahao Shentu , Jia Zhang

An energy-efficient voltage controlled domain wall device for implementing an artificial neuron and synapse is analyzed using micromagnetic modeling in the presence of room temperature thermal noise. By controlling the domain wall motion…

Mesoscale and Nanoscale Physics · Physics 2020-03-31 Md Ali Azam , Dhritiman Bhattacharya , Damien Querlioz , Caroline A. Ross , Jayasimha Atulasimha

Current induced spin-orbit torques (SOTs) in ferromagnet/non-magnetic metal heterostructures open vast possibilities to design spintronic devices to store, process and transmit information in a simple architecture. It is a central task to…

Mesoscale and Nanoscale Physics · Physics 2021-07-28 L. Chen , R. Islinger , J. Stigloher , M. M. Decker , M. Kronseder , D. Schuh , D. Bougeard , D. Weiss , C. H. Back

Spin-orbit torques enable energy-efficient manipulation of magnetization by electric current and hold promise for applications ranging from nonvolatile memory to neuromorphic computing. Here we report the discovery of a giant spin-orbit…

Mesoscale and Nanoscale Physics · Physics 2024-01-11 Eric Arturo Montoya , Xinyao Pei , Ilya N. Krivorotov

Recent years have witnessed growing interest in the use of Artificial Neural Networks (ANNs) for vision, classification, and inference problems. An artificial neuron sums N weighted inputs and passes the result through a non-linear transfer…

Emerging Technologies · Computer Science 2016-11-18 Deliang Fan , Yong Shim , Anand Raghunathan , Kaushik Roy

Spin waves (SWs), the collective precessional motion of spins in a magnetic system, have been proposed as a promising alternative system with low-power consumption for encoding information. Spin Hall nano-oscillator (SHNO), a new-type…

Mesoscale and Nanoscale Physics · Physics 2020-12-02 Liyuan Li , Lina Chen , Ronghua Liu , Youwei Du

Neuromorphic computing, inspired by the brain's parallel and energy-efficient processing, offers a transformative approach to artificial intelligence. In this study, we fabricated optimized spin-transfer torque nano-oscillators (STNOs) and…

Neuromorphic computing (NC) architecture has shown its suitability for energy-efficient computation. Amongst several systems, spin-orbit torque (SOT) based domain wall (DW) devices are one of the most energy-efficient contenders for NC. To…

Mesoscale and Nanoscale Physics · Physics 2022-12-16 Durgesh Kumar , Ramu Maddu , Hong Jing Chung , Hasibur Rahaman , Tianli Jin , Sabpreet Bhatti , Sze Ter Lim , Rachid Sbiaa , S. N. Piramanayagam

Spin polarized carriers electrically injected into a magnet from an external polarizer can exert a spin transfer torque (STT) on the magnetization. The phe- nomenon belongs to the area of spintronics research focusing on manipulating…

Materials Science · Physics 2015-06-05 N. Tesarova , P. Nemec , E. Rozkotova , J. Zemen , F. Trojanek , K. Olejnik , V. Novak , P. Maly , T. Jungwirth

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…

Complementary metal oxide semiconductor (CMOS) devices display volatile characteristics, and are not well suited for analog applications such as neuromorphic computing. Spintronic devices, on the other hand, exhibit both non-volatile and…

Magnetization switching by spin-orbit torque (SOT) via spin Hall effect represents as a competitive alternative to that by spin-transfer torque (STT) used for magnetoresistive random access memory (MRAM), as it does not require high-density…

Materials Science · Physics 2019-02-19 Yang Liu , Bing Zhou , Jian-Gang Zhu