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Spin-orbit coupling stands as a pivotal determinant in the realm of condensed matter physics. In recent, its profound influence on spin dynamics opens up a captivating arena with promising applications. Notably, the topological…

Mesoscale and Nanoscale Physics · Physics 2024-08-06 Taekoo Oh , Naoto Nagaosa

Ferromagnetism is a manifestation of strong repulsive interactions between itinerant fermions in condensed matter. Whether short-ranged repulsion alone is sufficient to stabilize ferromagnetic correlations in the absence of other effects,…

Quantum Gases · Physics 2017-07-07 G. Valtolina , F. Scazza , A. Amico , A. Burchianti , A. Recati , T. Enss , M. Inguscio , M. Zaccanti , G. Roati

Antiferromagnets with vanishingly small (or zero) magnetization are interesting candidates for spintronics applications. In the present paper we propose two models for description of the current-induced phenomena in antiferromagnetic…

Mesoscale and Nanoscale Physics · Physics 2013-06-03 Helen Gomonay , Vadim Loktev

We investigate spin-orbit torques on magnetization in an insulating ferromagnetic (FM) layer that is brought into a close proximity to a topological insulator (TI). In addition to the well-known field-like spin-orbit torque, we identify an…

Mesoscale and Nanoscale Physics · Physics 2019-07-03 R. J. Sokolewicz , I. A. Ado , M. I. Katsnelson , P. M. Ostrovsky , M. Titov

Antiferromagnetic (AF) domain walls have recently attracted revived attention, not only in the emerging field of AF spintronics, but also more specifically for offering fast domain wall velocities and dynamic excitations up to the terahertz…

Theoretical conditions to excite self-oscillation in a spin torque oscillator consisting of a perpendicularly magnetized free layer and an in-plane magnetized pinned layer are investigated by analytically solving the Landau-Lifshitz-Gilbert…

Mesoscale and Nanoscale Physics · Physics 2015-08-05 Tomohiro Taniguchi , Takahiro Ito , Yasuhiro Utsumi , Sumito Tsunegi , Hitoshi Kubota

We investigate spin dependent transport in hybrid superconductor(S)--normal-metal(N)--ferromagnet(F) structures under conditions of proximity effect. We demonstrate the feasibility of the absolute spin-valve effect for a certain interval of…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 Daniel Huertas-Hernando , Yu. V. Nazarov , W. Belzig

Non-adiabatic contribution of environmental degrees of freedom yields effective inertia of spin in effective spin dynamics. In this paper, we study several aspects of the inertia of spin in metallic ferromagnets. (i) a concrete expression…

Mesoscale and Nanoscale Physics · Physics 2015-11-17 Toru Kikuchi , Gen Tatara

A new spinmotive force is predicted in ferromagnets with spin-orbit coupling. By extending the theory of spinmotive force, we show that a time-varying electric field can induce a spinmotive force with static and uniform magnetization. This…

Mesoscale and Nanoscale Physics · Physics 2015-06-15 Yuta Yamane , Jun'ichi Ieda , Sadamichi Maekawa

In the past year, several groups have observed evidence for long-range spin-triplet supercurrent in Josephson junctions containing ferromagnetic (F) materials. In our work, the spin-triplet pair correlations are created by non-collinear…

A theory of magnetization dynamics in ferrimagnetic materials with antiparallel aligned spin sub-lattices under action of spin-transfer torques (STT) is developed. We consider magnetization dynamics in GdFeCo layers in two cases of magnetic…

Mesoscale and Nanoscale Physics · Physics 2019-10-02 Ivan Lisenkov , Roman Khymyn , Johan Akerman , Nian X. Sun , Boris A. Ivanov

In a ferromagnet/superconductor/ferromagnet (F/S/F) superconducting spin-valve (SSV), a change of the magnetization alignment of the two F layers modulates the critical temperature (Tc) of the S layer. The Tc-switching (the SSV effect) is…

Superconductivity · Physics 2024-07-19 Tomohiro Kikuta , Sachio Komori , Keiichiro Imura , Tomoyasu Taniyama

The energy of exchange coupled antiferromagnetic insulators (AFMIs) is a periodic function of the relative in-plane orientation of the N\'{e}el vector fields. We show that this leads to oscillations in the relative magnetization of exchange…

Mesoscale and Nanoscale Physics · Physics 2016-10-05 Yizhou Liu , Gen Yin , Jiadong Zang , Roger Lake , Yafis Barlas

We use a ferromagnetic voltage probe model to study the influence of inelastic scattering on giant magnetoresistance and current-induced torques in ferromagnetic and antiferromagnetic metal spin valves. The model is based on the Green's…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 R. A. Duine , P. M. Haney , A. S. Nunez , A. H. MacDonald

We study the nonlocal spin transport in a lateral spin valve with multiple ferromagnetic (FM) electrodes. When two current-injecting and two spin current-detecting electrodes are all ferromagnetic, the number of possible nonlocal spin…

Materials Science · Physics 2015-05-13 Tae-Suk Kim , Hyun-Woo Lee , B. C. Lee

When a spin-polarized current flows through a ferromagnet, the local magnetization receives a spin torque. Two consequences of this spin torque are studied. First, the uniformly magnetized ferromagnet becomes unstable if a sufficiently…

Materials Science · Physics 2015-06-25 Z. Li , J. He , S. Zhang

Antiferromagnetic (AFM) materials with zero or vanishingly small macroscopic magnetization are nowadays the constituent elements of spintronic devices. However, possibility to use them as active elements that show nontrivial controllable…

Materials Science · Physics 2013-05-30 Helen V. Gomonay , Roman Kunitsyn , Vadim M. Loktev

We propose and demonstrate spin manipulation by magnetically controlled modulation of pure spin currents in cobalt/copper lateral spin valves, fabricated on top of the magnetic insulator Y$_3$Fe$_5$O$_{12}$ (YIG). The direction of the YIG…

Understanding, manipulating, and using magnons - the quanta of spin waves - for energy-efficient applications is one of the primary goals of magnonics. In this paper, we consider a synthetic antiferromagnet in which one of the ferromagnetic…

Mesoscale and Nanoscale Physics · Physics 2024-06-10 Artim L. Bassant , Mexx E. Y. Regout , Joren S. Harms , Rembert A. Duine

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,…

Mesoscale and Nanoscale Physics · Physics 2017-05-17 Ricardo Zarzuela , Yaroslav Tserkovnyak