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Current-induced torques in ultrathin Co/Pt bilayers were investigated using an electrically driven FMR technique. The angle dependence of the resonances, detected by a rectification effect as a voltage, were analysed to determine the…

介观与纳米尺度物理 · 物理学 2014-03-05 T. D. Skinner , M. Wang , A. T. Hindmarch , A. W. Rushforth , A. C. Irvine , D. Heiss , H. Kurebayashi , A. J. Ferguson

When a spin-polarized current flows through a ferromagnetic (FM) metal, angular momentum is transferred to the background magnetization via spin-transfer torques. In antiferromagnetic (AFM) materials, however, the corresponding problem is…

介观与纳米尺度物理 · 物理学 2015-06-15 Ran Cheng , Qian Niu

Current induced magnetization switching by spin-orbit torques offers an energy-efficient means of writing information in heavy metal/ferromagnet (FM) multilayer systems. The relative contributions of field-like torques and damping-like…

介观与纳米尺度物理 · 物理学 2015-10-12 Meiyin Yang , Kaiming Cai , Hailang Ju , Kevin William Edmonds , Guang Yang , Shuai Liu , Baohe Li , Bao Zhang , Yu Sheng , Shouguo Wang , Yang Ji , Kaiyou Wang

New mechanism of magnetoresistance, based on tunneling-emission of spin polarized electrons from ferromagnets (FM) into semiconductors (S) and precession of electron spin in the semiconductor layer under external magnetic field, is…

材料科学 · 物理学 2009-11-10 A. M. Bratkovsky , V. V. Osipov

The use of graphene in spintronic devices is contingent on its ability to convert a spin current into a charge current. We have systematically investigated the spin pumping induced spin-to-charge current conversion at the Graphene/FM…

介观与纳米尺度物理 · 物理学 2024-05-28 Mahammad Tahir , Subhakanta Das , Mukul Gupta , Rohit Medwal , Soumik Mukhopadhyay

We study the spin orbit torque (SOT) and Dzyaloshinskii-Moriya interaction (DMI) in the dual-interfaced Co-Ni perpendicular multilayers. Through the combination of top and bottom layer materials (Pt, Ta, MgO and Cu), SOT and DMI are…

Inplane magnetization reversal of a permalloy/platinum bilayer was detected using the spin rectification effect. Using a sub GHz microwave frequency to excite spin torque ferromagnetic resonance (ST FMR) in the bilayer induces two discrete…

We suggest coherent switching of canted antiferromagnetic (AFM) spins using spin-orbit torque (SOT) in small magnet. The magnetic system of orthoferrite features biaxial easy anisotropy and the Dzyaloshinskii Moriya interaction, which is…

材料科学 · 物理学 2021-08-18 T. H. Kim , S. Hwang , S. Y. Hamh , S. H. Yoon , S. H. Han , B. K. Cho

We investigate spin transport in two dimensional ferromagnetic (FTI) and antiferromagnetic (AFTI) topological insulators. In presence of an in plane magnetization AFTI supports zero energy modes, which enables topologically protected edge…

介观与纳米尺度物理 · 物理学 2017-01-26 Sumit Ghosh , Aurelien Manchon

Current-induced spin-orbit torque (SOT) has emerged as a promising method for achieving energy-efficient magnetization switching in advanced spintronic devices. However, technological advancement has been inadequate because an external…

介观与纳米尺度物理 · 物理学 2025-01-23 Badsha Sekh , Hasibur Rahaman , Ramu Maddu , Pinkesh Kumar Mishra , Tianli Jin , S. N. Piramanayagam

The injection of pure spin current into superconductors by the dynamics of a ferromagnetic contact is studied theoretically. Taking into account suppression of the order parameter at the interfaces (inverse proximity effect) and the…

介观与纳米尺度物理 · 物理学 2009-01-22 Jan Petter Morten , Arne Brataas , Gerrit E. W. Bauer , Wolfgang Belzig , Yaroslav Tserkovnyak

Using orbital angular momentum (OAM) currents in nanoelectronics, for example, for magnetization manipulation via spin-orbit torque (SOT), represents a growing field known as "spin-orbitronics". Here, using the density functional theory…

材料科学 · 物理学 2025-02-14 Poonam Kumari , Cyrille Barreteau , Alexander Smogunov

Effective spin mixing conductance (ESMC) across the nonmagnetic metal (NM)/ferromagnet interface, spin Hall conductivity (SHC) and spin diffusion length (SDL) in the NM layer govern the functionality and performance of pure spin current…

材料科学 · 物理学 2016-09-02 L. Ma , H. A. Zhou , L. Wang , X. L. Fan , W. J. Fan , D. S. Xue , K. Xia , G. Y. Guo , S. M. Zhou

Current-induced spin-orbit torque (SOT) in normal metal/ferromagnet (NM/FM) bilayers bears great promise for technological applications, but the microscopic origin of purely interfacial SOTs in ultra-thin systems is not yet fully…

介观与纳米尺度物理 · 物理学 2023-02-02 Alessandro Veneri , David T. S. Perkins , Aires Ferreira

A device based on current-induced spin-orbit torque (SOT) that functions as an electronic neuron is proposed in this work. The SOT device implements an artificial neuron's thresholding (transfer) function. In the first step of a two-step…

新兴技术 · 计算机科学 2015-06-23 Abhronil Sengupta , Sri Harsha Choday , Yusung Kim , Kaushik Roy

Electrical currents in a magnetic insulator/heavy metal heterostructure can induce two simultaneous effects, namely, spin Hall magnetoresistance (SMR) on the heavy metal side and spin-orbit torques (SOTs) on the magnetic insulator side.…

As a topological Dirac semimetal with controllable spin-orbit coupling and conductivity, PtSe$_2$, a transition-metal dichalcogenide, is a promising material for several applications from optoelectric to sensors. However, its potential for…

We have studied spin orbit torque in heavy metal (HM)/ferromagnetic metal (FM) bilayers using magneto-optical Kerr effect. A double modulation technique is developed to separate signals from spin orbit torque and Joule heating. At a current…

介观与纳米尺度物理 · 物理学 2018-11-20 Yukihiro Marui , Masashi Kawaguchi , Masamitsu Hayashi

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…

材料科学 · 物理学 2021-02-09 Ke Tang , Zhenchao Wen , Yong-Chang Lau , Hiroaki Sukegawa , Takeshi Seki , Seiji Mitani

Symmetry and magnitude of spin-orbit torques (SOT), i.e., current-induced torques on the magnetization of systems lacking inversion symmetry, are investigated in a fully relativistic linear response framework based on the Kubo formalism. By…