Effect of asymmetric leads on critical switching current in magnetic nanopillars

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

APPLIED PHYSICS LETTERS, cilt.89, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 89 Konu: 8
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1063/1.2336719


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.