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A complete set of the generalized drift-diffusion equations for a coupled charge and spin dynamics in ferromagnets in the presence of extrinsic spin-orbit coupling is derived from the quantum kinetic approach, covering major transport…

介观与纳米尺度物理 · 物理学 2018-05-02 C. O. Pauyac , M. Chshiev , A. Manchon , S. A. Nikolaev

An antiferromagnet is a promising material for spin-orbit torque generation. Earlier studies of the spin-orbit torque in an antiferromagnet are limited to collinear spin configurations. We calculate the spin-orbit torque in an…

介观与纳米尺度物理 · 物理学 2018-04-04 Suik Cheon , Hyun-Woo Lee

Non-equilibrium spin-dependent transport in magnetic tunnel junctions comprising a ferroelectric barrier is theoretically investigated. The exact solutions of the free electron Schr\"odinger equation for electron tunneling in the presence…

介观与纳米尺度物理 · 物理学 2012-11-20 A. Useinov , A. Manchon

Exploiting both spin and charge of the electron in electronic micordevices has lead to a tremendous progress in both basic condensed-matter research and microelectronic applications, resulting in the modern field of spintronics. Current…

材料科学 · 物理学 2015-06-25 X. Martí , I. Fina , T. Jungwirth

An important consequence of the discovery of giant magnetoresistance in metallic magnetic multilayers is a broad interest in spin dependent effects in electronic transport through magnetic nanostructures. An example of such systems are…

介观与纳米尺度物理 · 物理学 2009-11-13 J. Barnas , I. Weymann

We examine a modified drift-diffusion formalism to describe spin transport near an ultrathin magnet whose thickness is similar to or less than the spin dephasing length. Most of the previous theories on spin torque assume the transverse…

介观与纳米尺度物理 · 物理学 2019-06-19 Kyoung-Whan Kim

An important goal of spintronics is to covert a charge current into a spin current with a controlled spin polarization that can exert torques on an adjacent magnetic layer. Here we demonstrate such torques in a two ferromagnet system. A…

介观与纳米尺度物理 · 物理学 2020-05-20 Christopher Safranski , Jun-Wen Xu , Andrew D. Kent , Jonathan Z. Sun

The magnitude of spin-orbit torque (SOT), exerted to a ferromagnet (FM) from an adjacent heavy metal (HM), strongly depends on the amount of spin currents absorbed in the FM. We exploit the large spin absorption at the Ru interface to…

For prospective spintronics devices based on the propagation of pure spin currents, antiferromagnets are an interesting class of materials that potentially entail a number of advantages as compared to ferromagnets. Here, we present a…

We study the behavior of non-equilibrium spin density and spin-orbit torque in a topological insulator - antiferromagnet heterostructure. Unlike ferromagnetic heterostructures where Dirac cone is gapped due to time-reversal symmetry…

介观与纳米尺度物理 · 物理学 2019-07-17 Sumit Ghosh , Aurelien Manchon

Antiferromagnets and compensated ferrimagnets offer opportunities to investigate spin dynamics in the 'terahertz gap' because their resonance modes lie in the 0.3 THz to 3 THz range. Despite some inherent advantages when compared to…

Spin textures such as magnetic domain walls and skyrmions have the potential to revolutionize electronic devices by encoding information bits. Although recent advancements in ferromagnetic films have led to promising device prototypes,…

材料科学 · 物理学 2023-07-18 Kang Wang , Vineetha Bheemarasetty , Gang Xiao

Use of a spin polarized current for the manipulation of magnetic domain walls in ferromagnetic nanowires has been the subject of intensive research for many years. Recently, due to technological advancements, creating nano-contacts with…

介观与纳米尺度物理 · 物理学 2020-08-10 Hamidreza Kazemi , Sebastian Eggert , Nicholas Sedlmayr

Using an atomistic spin model, we have simulated spin wave injection and propagation into antiferromagnetic IrMn from an exchange coupled CoFe layer. The spectral characteristics of the exited spin waves have a complex beating behavior…

材料科学 · 物理学 2020-08-10 Sarah Jenkins , Roy W. Chantrell , Richard F. L. Evans

We investigate the formation and dynamics of spin textures in antiferromagnetic insulators adjacent to a heavy-metal substrate with strong spin-orbit interactions. Exchange coupling to conduction electrons engenders an effective anisotropy,…

介观与纳米尺度物理 · 物理学 2017-05-17 Ricardo Zarzuela , Yaroslav Tserkovnyak

The spin flip of the conduction electrons at the interface of a ferromagnetic and a nonmagnetic part of a metallic wire, suspended between two electrodes, is shown to tort the wire when a current is driven through it. In order to enhance…

强关联电子 · 物理学 2016-10-26 Peter Fulde , Stefan Kettemann

Antiferromagnets as active elements of spintronics can be faster than their ferromagnetic counterparts and more robust to magnetic noise. Owing to the strongly exchange-coupled magnetic sublattice structure, antiferromagnetic order…

介观与纳米尺度物理 · 物理学 2017-05-31 Olena Gomonay , Vincent Baltz , Arne Brataas , Yaroslav Tserkovnyak

Ferromagnetic resonance (FMR) driven spin pumping is an emerging technique for injection of a pure spin current from a ferromagnet (FM) into a non-magnetic (NM) material without an accompanying charge current. It is widely believed that…

According to the spin-torque model, current-driven magnetic dynamics in ferromagnetic multilayers is determined by the transfer of electron spin perpendicular to the layers' magnetizations. By separating the largest contributions to the…

材料科学 · 物理学 2007-05-23 S. Urazhdin

We measured spin transport in nonferromagnetic (NM) metallic multilayers from the contribution to damping due to spin pumping from a ferromagnetic Co90Fe10 thin film. The multilayer stack consisted of NM1/NM2/Co90Fe10(2 nm)/NM2/NM3 with…

介观与纳米尺度物理 · 物理学 2013-05-23 C. T. Boone , H. T. Nembach , J. M. Shaw , T. J. Silva