| Author(s): |
Meng Zhu; Cindi L. Dennis; Robert D. McMichael; |
| Title: |
Temperature dependence of adiabatic spin transfer torque and current polarization in Ni80Fe20 by spin wave Doppler measurements |
| Published: |
April 23, 2010 |
| Abstract: |
A spin wave Doppler technique is used to measure the temperature dependence of both the magnetization drift velocity and the current polarization in current-carrying Ni80Fe20 wires. For current densities of 1011 A/m2, we obtain magnetization drift velocities decreasing from 4.8 m/s {+or-} 0.4 m/s to 4.0 m/s {+or-} 0.1 m/s over a temperature range from 80 K to 340 K. Interpretation of velocity values yields current polarization dropping from 0.70{+or-}0.04 to 0:55{+or-}0.01 over the same temperature range. Analysis indicates diff erent temperature dependencies for spin-up and spin-down conductivities, suggesting a strong impurity scattering of spin-down electrons. |
| Citation: |
Physical Review B |
| Volume: |
81 |
| Pages: |
4 pp. |
| Keywords: |
spin waves; Doppler; spin transfer torque; magnetism; ferromagnetic metals; current polarization; spin current |
| Research Areas: |
Nanoelectronics and Nanoscale Electronics |
| PDF version: |
 Click here to retrieve PDF version of paper (1MB) |
