Quantum Interference Control of Ballistic Magneto- resistance in a Magnetic Nanowire Containing Two Atomic- Size Domain Walls

Document Type : Research Paper

Authors

1 Department of Optics and Laser Engineering, University of Bonab, 5551761167 Bonab, Iran,

2 Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Evin,1983963113, Tehran, Iran.

10.7508/jns.2012.02.007

Abstract

The magnetoresistance of a one-dimensional electron gas in a metallic ferromagnetic nanowire containing two atomic-size domain walls has been investigated in the presence of spin-orbit interaction. The magnetoresistance is calculated in the ballistic regime, within the Landauer-Büttiker formalism. It has been demonstrated that the conductance of a magnetic nanowire with double domain walls can be controlled through the domain walls separation. Also, we have represented another alternative way that enables us to handle easily the magnetoresistance of such a system as well as its conductance by utilizing the Rashba-type spin-orbit interaction induced by the external gates.

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