Effect of Tunnel Barrier Thickness on Spin-Transfer Torque, Charge Current, and Shot Noise in a Magnetic Tunnel Junction Nanostructure
In: Journal of Superconductivity and Novel Magnetism, Jg. 29 (2016-02-19), S. 1675-1680
Online
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Zugriff:
We study tunnel barrier thickness effects on spin-transfer torque (STT) components, charge current, and thermal-shot noise power in an MgO-based magnetic tunnel junction (MTJ) nanostructure using non-equilibrium Green’s function (NEGF) formalism. Also, the bias dependence of the in-plane and perpendicular torkances is investigated. From the NEGF calculations, we find that the STT components are independent of barrier thickness. Magnetization dynamics is described by the Landau-Lifshits-Gilbert (LLG) equation. The charge current decreases for increasing barrier thicknesses. The thermal-shot noise shows linear behavior with increasing of bias voltage for different barrier thicknesses.
Titel: |
Effect of Tunnel Barrier Thickness on Spin-Transfer Torque, Charge Current, and Shot Noise in a Magnetic Tunnel Junction Nanostructure
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Autor/in / Beteiligte Person: | Daqiq, Reza ; Ghobadi, Nader |
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Zeitschrift: | Journal of Superconductivity and Novel Magnetism, Jg. 29 (2016-02-19), S. 1675-1680 |
Veröffentlichung: | Springer Science and Business Media LLC, 2016 |
Medientyp: | unknown |
ISSN: | 1557-1947 (print) ; 1557-1939 (print) |
DOI: | 10.1007/s10948-016-3455-9 |
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