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

Autor: Wu, M. C., Aziz, A., Ali, M., Marrows, C. H., Hickey, B. J., Barber, Z. H., Blamire, M. G.
Předmět:
Zdroj: Applied Physics Letters; 3/23/2009, Vol. 94 Issue 12, p122511, 3p, 3 Graphs
Abstrakt: 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. [ABSTRACT FROM AUTHOR]
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