Zhu, M.
, Soe, B.
, McMichael, R.
, Carey, M.
, Maat, S.
and R., J.
(2011),
Enhanced magnetization drift velocity and current polarization in (CoFe)_{1-x}Ge_{x} alloys, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906778
(Accessed December 26, 2024)
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Enhanced magnetization drift velocity and current polarization in (CoFe)_{1-x}Ge_{x} alloys
Published
Author(s)
, Brian D. Soe, , Matthew Carey, Stefan Maat, Jeffrey R. Childress
Abstract
A spin wave Doppler technique is used to measure the drift velocity of the magnetization in current-carrying (CoFe)_{1-x}Ge_{x} alloys. For a current density of 10^11 A/m2, we obtain a large enhancement of drift velocity from 3.1+/-0.2 m/s for CoFe to 8.2+/-0.6 m/s for (CoFe)_{0.7}Ge_{0.3}. Interpretation of these values yields current polarization increasing from 0.84+/-0.04 to 0.95+/-0.05 as the Ge doping increases. The spin dependent conductivities indicate a stronger percentage change in minority spin conductivity, which agrees with the prediction of a pseudogap in the minority band for (CoFe)_{0.75}Ge_{0.25}.Citation
Applied Physics Letters
Volume
98
Issue
7
Pub Type
Journals
Download Paper
Keywords
Spin wave Doppler, CoFeGe alloys, current spin polarization
Citation
Issues
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Created February 17, 2011, Updated February 19, 2017