| Author(s): |
Paul M. Haney; Christian Heiliger; Mark D. Stiles; |
| Title: |
Bias dependence of magnetic exchange interactions: application to interlayer exchange coupling in spin valves. |
| Published: |
February 03, 2009 |
| Abstract: |
We study how a bias voltage changes magnetic exchange interactions. We derive a general expression for magnetic exchange interactions for open systems under a bias potential, and apply it to spin valves. We find that for metallic systems, the interlayer exchange coupling shows a weak, oscillatory dependence on the bias potential. For tunneling systems, we find a quadratic dependence on the bias potential, and derive an approximate expression for this bias dependence for a toy model. We give general conditions for when the bias dependence must be quadratic. |
| Citation: |
Physical Review B (Condensed Matter and Materials Physics) |
| Volume: |
79 |
| Issue: |
5 |
| Pages: |
pp. 1 - 9 |
| Keywords: |
Interlayer exchange coupling; spin transfer torque |
| Research Areas: |
Nanomagnetics |
| PDF version: |
 Click here to retrieve PDF version of paper (249KB) |
