Saslow, W.
and Taniguchi, T.
(2014),
Dissipation due to pure spin current generated by spin pumping, Physical Review B, [online], https://doi.org/10.1103/PhysRevB.90.214407
(Accessed December 21, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Dissipation due to pure spin current generated by spin pumping
Published
Author(s)
Wayne M. Saslow, Tomohiro Taniguchi
Abstract
Based on spin-dependent transport theory and thermodynamics, we develop a generalized theory of the Joule heating in the presence of a spin current. Along with the conventional Joule heating consisting of an electric current and electro-chemical potential, it is found that the spin current and spin accumulation give an additional dissipation because the spin-dependent scatterings inside bulk and ferromagnetic/nonmagnetic interface lead to a change of entropy. The theory is applied to investigate the dissipation due to pure spin current generated by spin pumping in a ferromagnetic/nonmagnetic/ferromagnetic multilayer. The dissipation arises from an interface because the spin pumping is a transfer of both the spin angular momentum and the energy from the ferromagnet to conduction electrons near the interface. It is found that the dissipation is proportional to the Gilbert damping constant enhanced by spin pumping.Citation
Physical Review B
Volume
90
Issue
21
Pub Type
Journals
Download Paper
Keywords
Magnetic damping, spin current, Joule heating, magnetic multilayers, non-equilibrium thermodynamics, spin-transfer torque
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created December 1, 2014, Updated November 10, 2018