Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).
NIST Authors in Bold
|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)|
|Pages:||pp. 1 - 9|
|Keywords:||Interlayer exchange coupling, spin transfer torque|
|PDF version:||Click here to retrieve PDF version of paper (255KB)|