Spin pumping and magnetization dynamics in metallic multilayers

By Y. Tserkovnyak, A. Brataas, G. Bauer. 2002

677 citations recorded by the source corpus.

We study the magnetization dynamics in thin ferromagnetic films and small ferromagnetic particles in contact with paramagnetic conductors. A moving magnetization vector causes ‘‘pumping’’ of spins into adjacent nonmagnetic layers. This spin transfer affects the magnetization dynamics similar to the Landau-LifshitzGilbert phenomenology. The additional Gilbert damping is significant for small ferromagnets, when the nonmagnetic layers efficiently relax the injected spins, but the effect is reduced when a spin accumulation build-up in the normal metal opposes the spin pumping. The damping enhancement is governed by ~and, in turn, can be used to measure! the mixing conductance or spin-torque parameter of the ferromagnet‐normal-metal interface. Our theoretical findings are confirmed by agreement with recent experiments in a variety of multilayer systems.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/95de7e068063c169667db57cad49358080a84df1

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In Atomic and Molecular Physics, and Optics

In Condensed Matter Physics

Citations in the corpus

Spin Hall Effects in Metals (2013, background): “this will result in an increased back flow of spins into the ferromagnet, and, therefore, a reduced effective spin mixing conductance [189].”
Perpendicular magnetic anisotropy at transition metal/oxide interfaces and applications (2017, background): “This variation can be explained by a spinpumping effect (Tserkovnyak, Brataas, and Bauer, 2002).”
Approximate theory of microwave generation in a current-driven magnetic nanocontact magnetized in an arbitrary direction (2005, background): “Following [1]–[3] and [11], [12], we shall assume that the current of conductance electrons passing through the “fixed” ferromagnetic layer becomes spin-polarized in the direction of the unit vector (parallel to the direction of the static magnetization of the “fixed” layer ), due to the different m”
Nonlocal magnetization dynamics in ferromagnetic heterostructures (2004, methodology): “It is instructive to scrutinize the energy and spin– angular-momentum conservation laws of the combined F|N system in the laboratory frame of reference (Tserkovnyak et al., 2002b).”
Micro-focused Brillouin light scattering: imaging spin waves at the nanoscale (2015, methodology): “Owing to current achievements in the field of spintronics, an electrical detection of spin waves utilizing a combination of spin pumping and the inverse spin Hall effect has also been reported [26–33].”
Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems (2018, background): “This effect is the reciprocal to spin pumping, where the field-excited precessing magnetization pumps a spin current in the adjacent NM (Saitoh et al., 2006; Tserkovnyak et al., 2002a).”