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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

Current-induced spin-orbit torques in Co$_2$FeAl/Pt ultrathin bilayers are studied using a magnetoresistive harmonic response technique, which distinguishes the dampinglike and fieldlike contributions. The presence of a…

Mesoscale and Nanoscale Physics · Physics 2018-01-17 T. A. Peterson , A. P. McFadden , C. J. Palmstrøm , P. A. Crowell

We report the measurement of efficient charge-to-spin conversion at room temperature in Weyl semimetal/ferromagnet heterostructures with both oxidized and pristine interfaces. Polycrystalline films of the Weyl semimetal, TaAs, are grown by…

We report measurements of the thickness and temperature (T) dependencies of current-induced spin-orbit torques, especially the field-like (FL) component, in various heavy metal (HM)/normal metal (NM) spacer/ferromagnet (FM)/Oxide (MgO and…

Materials Science · Physics 2016-11-02 Yongxi Ou , Chi-Feng Pai , Shengjie Shi , D. C. Ralph , R. A. Buhrman

Spintronic devices are based on heterojunctions of two materials with different magnetic and electronic properties. Although an energy barrier is naturally formed even at the interface of metallic heterojunctions, its impact on spin…

Topological quantum materials, with novel spin textures and broken crystal symmetries are suitable candidates for spintronic memory technologies. Their unique electronic properties, such as protected surface states and exotic…

Orbital torque, associated with orbital current, enables light metals to efficiently manipulate magnetization with rich tunability. A clear demonstration of perpendicular magnetization switching using light metals alone is essential for…

Materials Science · Physics 2024-10-04 Teng Xu , Aihua Tang , Kang Wang , Yizhou Liu , Haifeng Du

The generation, manipulation and detection of spin-polarized electrons in nanostructures define the main challenges of spin-based electronics[1]. Amongst the different approaches for spin generation and manipulation, spin-orbit coupling,…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Sergio O. Valenzuela , M. Tinkham

Spin-orbit torques in bilayers of ferromagnetic and nonmagnetic materials hold promise for energy efficient switching of magnetization in nonvolatile magnetic memories. Previously studied spin Hall and Rashba torques originate from…

Mesoscale and Nanoscale Physics · Physics 2018-11-05 C. Safranski , E. A. Montoya , I. N. Krivorotov

We propose an experimental scheme to determine the spin-transfer torque efficiency excited by the spin-orbit interaction in ferromagnetic bilayers from the measurement of the longitudinal magnetoresistace. Solving a diffusive spin-transport…

Mesoscale and Nanoscale Physics · Physics 2016-10-04 Tomohiro Taniguchi , Julie Grollier , Mark D. Stiles

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…

Mesoscale and Nanoscale Physics · Physics 2014-03-05 T. D. Skinner , M. Wang , A. T. Hindmarch , A. W. Rushforth , A. C. Irvine , D. Heiss , H. Kurebayashi , A. J. Ferguson

Three dimensional topological insulator bismuth selenide (Bi2Se3) is expected to possess strong spin-orbit coupling and spin-textured topological surface states, and thus exhibit a high charge to spin current conversion efficiency. We…

Materials Science · Physics 2015-06-01 Yi Wang , Praveen Deorani , Karan Banerjee , Nikesh Koirala , Matthew Brahlek , Seongshik Oh , Hyunsoo Yang

An electric current in the presence of spin-orbit coupling can generate a spin accumulation that exerts torques on a nearby magnetization. We demonstrate that, even in the absence of materials with strong bulk spin-orbit coupling, a torque…

The use of the spin Hall effect and its inverse to electrically detect and manipulate dynamic spin currents generated via ferromagnetic resonance (FMR) driven spin pumping has enabled the investigation of these dynamically injected currents…

We theoretically examine the spin-transfer torque in the presence of spin-orbit interaction (SOI) at impurities in a ferromagnetic metal on the basis of linear response theory. We obtained, in addition to the usual spin-transfer torque, a…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Junya Shibata , Hiroshi Kohno

High density data storage and spin-logic devices require highly efficient all-electric control of spin moments. So far, charge-to-spin conversion through the spin Hall effect (SHE) highly limits to d-orbital materials associated with strong…

Materials Science · Physics 2025-10-28 Gen Li , Ying Zhang , Xiaoguang Xu , Lei Shen , Zheng Feng , Kangkang Meng , Ang Li , Lu Cheng , Kang He , Wei Tan , Yong Wu , Yihong Wu , Yong Jiang

Orbital angular momentum transport has emerged as a promising route for manipulating magnetic devices, yet its generation has largely relied on the conventional orbital Hall effect. Here, we show that ferro-rotational order enables the…

Materials Science · Physics 2026-02-12 Daegeun Jo , Peter M. Oppeneer

Recent discovery of orbital currents in several material platforms including light element metals has opened new possibilities for exploring novel transport phenomena and applications to spin-orbitronic devices. These orbital currents,…

Efficient generation of spin currents from charge currents is of high importance for memory and logic applications of spintronics. In particular, generation of spin currents from charge currents in high spin-orbit coupling metals has the…

Using the linear response formalism for the spin-orbit torque (SOT) we compute from first principles the SOT in a system of two layers of L1$_0$-FePt(001) deposited on an fcc Pt(001) substrate of varying thickness. We find that at room…

Materials Science · Physics 2015-06-22 Guillaume Géranton , Frank Freimuth , Stefan Blügel , Yuriy Mokrousov
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