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We proposed a novel and simple multilayer structure to realize the deterministic switching of perpendicularly magnetized layers (Co in our work) by spin orbital torque from the spin Hall Effect in this paper. A pinned layer is introduced,…

计算物理 · 物理学 2017-05-08 Sumei Wang

We consider the spin torque induced by a current flowing ballistically through a magnetic domain wall. In addition to a global pressure in the direction of the electronic flow, the torque has an internal structure of comparable magnitude…

介观与纳米尺度物理 · 物理学 2009-11-10 Xavier Waintal , Michel Viret

It is shown that a pulsed current driven through Ni nanowires provokes an irreversible magnetization reversal at a field distant from the spontaneous switching field $H_{sw}$ by $\Delta H$ of as much as 40 % of $H_{sw}$. The state of the…

材料科学 · 物理学 2009-10-31 J. -E. Wegrowe , D. Kelly , Ph. Guittienne , J-Ph. Ansermet

We study spin-dependent electron transport through a ferromagnetic-antiferromagnetic-normal metal tunneling junction subject to a voltage or temperature bias, in the absence of spin-orbit coupling. We derive microscopic formulas for various…

介观与纳米尺度物理 · 物理学 2018-09-11 Kei Yamamoto , Olena Gomonay , Jairo Sinova , Georg Schwiete

By means of local ion implantation, we investigated the influence of lateral interface on current-induced magnetic switching by spin-orbit torque in a perpendicularly magnetized Pt/Co/Ta multilayer. The experimental results show that, in…

应用物理 · 物理学 2024-06-19 Yanru Li , Meiyin Yang , Guoqiang Yu , Baoshan Cui , Jun Luo

We propose a semi-classical model for femtosecond-laser induced demagnetization due to spin-polarized excited electron diffusion in the super-diffusive regime. Our approach treats the finite elapsed time and transport in space between…

材料科学 · 物理学 2011-06-14 Marco Battiato , Karel Carva , Peter M. Oppeneer

We study current-induced deterministic magnetization switching and domain wall motion via polar Kerr microscopy in all-amorphous W$_{66}$Hf$_{34}$/CoFeB/TaO$_\text{x}$ with perpendicular magnetic anisotropy and large spin Hall angle.…

材料科学 · 物理学 2020-09-23 Katharina Fritz , Lukas Neumann , Markus Meinert

We calculate the spin-transfer torque in Fe/MgO/Fe tunnel junctions and compare the results to those for all-metallic junctions. We show that the spin-transfer torque is interfacial in the ferromagnetic layer to a greater degree than in…

介观与纳米尺度物理 · 物理学 2009-11-13 Christian Heiliger , M. D. Stiles

The spin transfer torque (STT) can lead to steady precession of magnetization without any external applied field in magnetic spin valve where the magnetic layer have very different spin diffusion length. This effect is associated with an…

材料科学 · 物理学 2009-11-13 O. Boulle , V. Cros , J. Grollier , L. G. Pereira , C. Deranlot , F. Petroff , G. Faini , J. Barnas , A. Fert

The occurrence of inhomogeneous spin-density distribution in multilayered ferromagnetic diluted magnetic semiconductor nanostructures leads to strong dependence of the spin-polarized transport properties on these systems. The spin-dependent…

Non-uniform current distributions of spin valves with disk shaped free layers are investigated. In the context of spin valves, the vortex state, which is the ground-state in many disk shaped magnetic bodies, allows for distinct parallel…

We observe a strong thermally-controlled magnon-mediated interlayer coupling of two ferromagnetic layers via an antiferromagnetic spacer in spin-valve type trilayers. The effect manifests itself as a field-induced coherent switching of the…

介观与纳米尺度物理 · 物理学 2021-06-09 Dmytro M. Polishchuk , Yuliia O. Tykhonenko-Polishchuk , Olena V. Gomonay , Vladislav Korenivski

We investigate the spin-transfer torque in a magnetic multilayer structure by means of a spin-diffusion model. The torque in the considered system, consisting of two magnetic layers separated by a conducting layer, is caused by a…

An anomalous (inverse) spin accumulation in the nonmagnetic spacer may build up when the spin valve consists of magnetic films having different spin symmetries. This leads to wavy-like dependence of spin-transfer torque on the angle between…

介观与纳米尺度物理 · 物理学 2010-04-12 E. Jaromirska , P. Balaz , L. Lopez Diaz , J. Barnas

The demagnetization and associated magnetocaloric effect in strong-weak-strong ferromagnetic trilayers, upon a reorientation of the strong ferromagnets from parallel to antiparallel magnetization, is simulated using atomistic spin dynamics.…

介观与纳米尺度物理 · 物理学 2022-12-28 Milton Persson , Mykola Kulyk , Anatolii Kravets , Vladislav Korenivski

Spin-orbit spin transfer torque allows an efficient control of magnetization by an in-plane current. Recent experiments found that the spin-orbit torque has strong dependence on the magnetization angle [Garello et al., Nature Nanotechnol.…

材料科学 · 物理学 2016-01-20 Seo-Won Lee , Kyung-Jin Lee

We study the effects of spin transfer on thermally activated dynamics of magnetic nanopillars with identical thicknesses of the magnetic layers. The symmetric nanopillars exhibit anomalous dependencies of switching statistics on magnetic…

材料科学 · 物理学 2009-11-13 Weng L. Lim , Nicholas Anthony , Andrew Higgins , Sergei Urazhdin

We present an analytical study of the proximity effect in ferromagnet/superconductor (F/S) heterostructures, allowing for an arbitrary magnetic exchange energy as well as arbitrary impurity and spin-flip scattering rates within a…

超导电性 · 物理学 2009-11-13 Jacob Linder , Malek Zareyan , Asle Sudbø

Recent experiments have revealed nonlinear features of the magnetoresistance in metallic bilayers consisting of a heavy-metal (HM) and a ferromagnetic metal (FM). A small change in the lon- gitudinal resistance of the bilayer has been…

介观与纳米尺度物理 · 物理学 2016-10-20 Steven S. -L. Zhang , Giovanni Vignale

We study the distribution of switching times in spin-transfer switching induced by sub-ns current pulses in pillar-shaped spin-valves. The pulse durations leading to switching follow a comb-like distribution, multiply-peaked at a few most…

强关联电子 · 物理学 2009-11-11 T. Devolder , C. Chappert , J. A. Katine , M. J. Carey , K. Ito