| Author(s): |
Meng Zhu; Brian D. Soe; Robert D. McMichael; Matthew Carey; Stefan Maat; Jeffrey R. Childress; |
| Title: |
Enhanced magnetization drift velocity and current polarization in (CoFe)_{1-x}Ge_{x} alloys |
| Published: |
February 17, 2011 |
| 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 |
| Pages: |
3 pp. |
| Keywords: |
Spin wave Doppler; CoFeGe alloys; current spin polarization |
| Research Areas: |
Physics, Magnetic materials, Electron Physics |
| PDF version: |
 Click here to retrieve PDF version of paper (494KB) |
