6533b824fe1ef96bd1280b69

RESEARCH PRODUCT

Spin transport in ferromagnetic/normal-metal tunnel junction arrays

J. Johansson

subject

PhysicsCondensed matter physicsCoulomb blockadeCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsVDP::Mathematics and natural science: 400::Physics: 430Electronic Optical and Magnetic MaterialsMetalSingle electron tunnelingFerromagnetismTunnel junctionvisual_artvisual_art.visual_art_mediumSpin (physics)

description

Published version of an article in the journal: Physical Review B. Also available from the publisher:http://dx.doi.org/10.1103/PhysRevB.85.094421 An array of alternating ferromagnetic and normal-metal islands separated by small tunnel junctions is theoretically investigated in the sequential tunneling regime. A numerical Monte Carlo method is used to calculate the transport properties. The spin-dependent tunneling currents give rise to nonequilibrium spin accumulation on the normal island. The tunneling magneto resistance (TMR) is calculated for a large range of array parameters. The TMR oscillates with bias voltage and can become negative for certain array parameters. We show that the long-range electrostatic interaction in the arrays can significantly increase the TMR; for experimentally accessible parameters the magnitude of the TMR can be as large as 100%.

yearjournalcountryeditionlanguage
2012-03-20Physical Review B
https://doi.org/10.1103/physrevb.85.094421