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Spin-orbit torques offer a promising mechanism for electrically controlling magnetization dynamics in nanoscale heterostructures. While spin-orbit torques occur predominately at interfaces, the physical mechanisms underlying these torques…

介观与纳米尺度物理 · 物理学 2020-12-02 Vivek P. Amin , Paul M. Haney , Mark D. Stiles

Magnon spin transport in a metal-antiferromagnetic insulator-ferromagnetic insulator heterostructure is considered. The spin current is generated via the spin Seebeck effect and in the limit of clean sample where the effects of interface…

介观与纳米尺度物理 · 物理学 2023-03-23 Niklas Rohling , Roberto E. Troncoso

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

We report large enhancement of thermally injected spin current in normal metal (NM)/antiferromagnet(AF)/yttrium iron garnet(YIG), where a thin AF insulating layer of NiO or CoO can enhance spin current from YIG to a NM by up to a factor of…

材料科学 · 物理学 2019-09-25 Weiwei Lin , Kai Chen , Shufeng Zhang , C. L. Chien

We report a comprehensive study of the maximization of the spin Hall ratio ({\theta}SH) in Pt thin films by the insertion of sub-monolayer layers of Ti to decrease carrier lifetime while minimizing the concurrent reduction in the spin Hall…

材料科学 · 物理学 2019-11-13 Lijun Zhu , R. A. Buhrman

Two-dimensional electron gas (2DEG) formed at the interface between SrTiO3 (STO) and LaAlO3 (LAO) insulating layer is supposed to possess strong Rashba spin-orbit coupling. To date, the inverse Edelstein effect (i.e. spin-to-charge…

We theoretically study the conditions under which a spin Nernst effect - a transverse spin current induced by an applied temperature gradient - can occur in a canted antiferromagnetic insulator, such as ${\rm LaFeO_3}$ and other materials…

介观与纳米尺度物理 · 物理学 2024-05-24 Wesley Roberts , Bowen Ma , Martin Rodriguez-Vega , Gregory A. Fiete

Ferromagnetic materials exhibiting low magnetic damping ($\alpha$) and moderately high saturation magnetization are required from the viewpoints of generation, transmission and detection of spin wave. Since spin-to-charge conversion…

Spin transmission at ferromagnet/heavy metal interfaces is of vital importance for many spintronic devices. Usually the spin current transmission is limited by the spin mixing conductance and loss mechanisms such as spin memory loss. In…

Spin injection efficiency based on conventional ferromagnet (or half-metallic ferromagnet) /semiconductor is greatly limited by the Schmidt obstacle due to conductivity mismatch, here we proposed that by replacing the metallic injectors…

介观与纳米尺度物理 · 物理学 2014-12-01 G. Z. Xu , W. H. Wang , X. M. Zhang , Y. Wang , E. K. Liu , X. K. Xi , G. H. Wu

NiO is a good candidate for ultrafast magnetic switching because of its large spin density, antiferromagnetic order, and clearly separated intragap states. In order to detect and monitor the switching dynamics, we develop a systematic…

其他凝聚态物理 · 物理学 2008-11-26 C. Li , G. Lefkidis , W. Hübner

Spin-orbit torque (SOT) can be used to efficiently manipulate the magnetic state of magnetic materials, which is an essential element for memory and logic applications. Due to symmetry constraints, only in-plane spins can be injected into…

Increasing dampinglike spin-orbit torque (SOT) is both of fundamental importance for enabling new research into spintronics phenomena and also technologically urgent for advancing low-power spin-torque memory, logic, and oscillator devices.…

介观与纳米尺度物理 · 物理学 2019-06-12 Lijun Zhu , Lujun Zhu , Shengjie Shi , Manling Sui , D. C. Ralph , R. A. Buhrman

We reported a systematic study of spin-orbit torque biased magnetic sensors based on NiFe/Pt bilayers through both macro-spin modeling and experiments. The simulation results show that it is possible to achieve a linear sensor with a…

介观与纳米尺度物理 · 物理学 2017-12-13 Yanjun Xu , Yumeng Yang , Ziyan Luo , Baoxi Xu , Yihong Wu

The emergence of spin-orbit torques as a promising approach to energy-efficient magnetic switching has generated large interest in material systems with easily and fully tunable spin-orbit torques. Here, current-induced spin-orbit torques…

We predict the giant ferroelectric control of interfacial properties of Ni/HfO2, namely, (i) the magnetocrystalline anisotropy and (ii) the inverse spin and orbital Rashba effects. The reversible control of magnetic properties using…

材料科学 · 物理学 2024-12-09 Armando Pezo , Andrés Saul , Aurélien Manchon , Rémi Arras

Topological insulators have emerged as an important material class for efficient spin-charge interconversion. Most topological insulators considered to date are binary or ternary compounds, with the exception of $\alpha$-Sn. Here we report…

介观与纳米尺度物理 · 物理学 2021-06-30 Federico Binda , Can Onur Avci , Santos Francisco Alvarado , Paul Noël , Charles-Henri Lambert , Pietro Gambardella

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…

Realizing deterministic current-induced spin-orbit torque (SOT) magnetization switching, especially in systems exhibiting perpendicular magnetic anisotropy (PMA), typically requires the application of a collinear in-plane field, posing a…

应用物理 · 物理学 2024-07-08 Zhe Zhang , Zhuoyi Li , Yuzhe Chen , Fangyuan Zhu , Yu Yan , Yao Li , Liang He , Jun Du , Rong Zhang , Jing Wu , Xianyang Lu , Yongbing Xu

Spin transport at metallic interfaces is an essential ingredient of various spintronic device concepts, such as giant magnetoresistance, spin-transfer torque, and spin pumping. Spin-orbit coupling plays an important role in many such…

介观与纳米尺度物理 · 物理学 2020-07-01 G. G. Baez Flores , Alexey A. Kovalev , M. van Schilfgaarde , K. D. Belashchenko