Effect of asymmetric leads on critical switching current in magnetic nanopillars


Kurt H. , Alhajdarwish M., Pratt W. P. , Bass J.

APPLIED PHYSICS LETTERS, vol.89, no.8, 2006 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 89 Issue: 8
  • Publication Date: 2006
  • Doi Number: 10.1063/1.2336719
  • Title of Journal : APPLIED PHYSICS LETTERS

Abstract

Manschot [Appl. Phys. Lett. 85, 3250 (2004)] predicted that the critical current to switch the magnetizations in a ferromagnetic/nonmagnetic/ferromagnetic nanopillar from parallel to antiparallel could be reduced by up to a factor of 5 by pairing nonmagnetic leads with different effective resistances (resistivity times spin diffusion length). Comparing switching currents for Co/Cu/Co nanopillars with Pt and AgSn(5%) leads on alternate sides of the nanopillar did not give the large reduction predicted by Manschot Possible reasons for this lack are discussed. (c) 2006 American Institute of Physics.