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Reduction in critical current of current induced switching in an inhomogeneous nanomagnet

Research output: Contribution to journalJournal article

Published

  • M. C. Wu
  • A. Aziz
  • M. Ali
  • C. H. Marrows
  • B. J. Hickey
  • Z. H. Barber
  • M. G. Blamire
Article number122511
Journal publication date23/03/2009
JournalApplied Physics Letters
Journal number12
Volume94
Number of pages3
Original languageEnglish

Abstract

We report low current-density switching of pseudospin valve nanopillars fabricated by a three-dimensional focused ion beam lithography. Simulations using the Landau-Liftshitz-Gilbert equation with Slonczewski spin transfer torque term demonstrate that magnetostatic coupling combined with an in-plane applied field results in a strongly inhomogeneous magnetization, which is close to the point of switching in both parallel and antiparallel configurations and so significantly reduced switching currents are possible.