Spin Hall Effect Without Spin-Orbit Coupling in a Homogeneous Ferromagnet

Authors: Kravchenko, V. Ya.; Tsoi, V.S.

Source: Journal of Nanoelectronics and Optoelectronics, Volume 3, Number 1, March 2008 , pp. 86-92(7)

Publisher: American Scientific Publishers

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Abstract:

Spin (magnetization) dynamics defines functionality of spintronic devices. Here we discuss two effects in magnetic dynamics—the spin Hall effect and the current-driven magnon generation. The spin Hall effect without spin-orbit coupling is considered in a monodomain ferromagnet where an electric current flow can induce a so-called anomalous or spontaneous current similar to the Hall current. Because the induced current is spin-polarized, a non-equilibrium magnetization accumulates near the ferromagnet's boundaries. We determine the basic characteristics of the spin Hall effect without spin-orbit coupling using a simple model. This effect contributes, particularly, in the anomalous Hall effect. We analyze the possibility of magnon generation in a monodomain ferromagnet by means of this new type of the spin Hall effect.

Keywords: SPIN-ORBIT COUPLING; THE SPIN HALL EFFECT; THE ANOMALOUS HALL EFFECT; CURRENT-DRIVEN MAGNON GENERATION

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jno.2008.011

Publication date: 2008-03-01

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Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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