Stiles, M.
and McMichael, R.
(2008),
A New Spin on the Doppler Effect, Science, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=620606
(Accessed October 31, 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.
A New Spin on the Doppler Effect
Published
Author(s)
,
Abstract
The coupling between ferromagnetism and electrical current has recently been the object of intense study because of the combination of interesting scientific developments and the potential technological impact. This coupling is mediated by spin current, the transport of electron spin that accompanies transport of electron charge in ferromagnetic metals. In one manifestation of ferromagnet-current coupling, called spin-transfer torque, the electrical current, acting through the spin current, can be used to move the domain pattern of the magnetization. The simplest description of this spin transfer torque anchors the magnetization in a medium that moves with the electron flow, such that magnetic features such as domain walls are carried "down-stream." In this issue, Vlaminck and Bailleu use a novel version of the Doppler effect to measure quantitatively the flow of this effective medium in a ferromagnetic wire.Citation
Science
Volume
322
Pub Type
Journals
Download Paper
Keywords
Spin wave, Spin current, magnetic domain, domain wall, ferromagnetic resonance, Doppler effect, spin-transfer torque, giant magnetoresistance, MRAM, racetrack memory
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created October 17, 2008, Updated February 19, 2017