03 خرداد 1403
نادر قبادي

نادر قبادی

مرتبه علمی: دانشیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک-حالت جامد
تلفن:
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
Effect of Tunnel Barrier Thickness on Spin-Transfer Torque, Charge Current, and Shot Noise in a Magnetic Tunnel Junction Nanostructure
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
MTJ nanostructure · Spin-transfer torque · Charge current · Thermal-shot noise
سال
2016
مجله Journal of Superconductivity and Novel Magnetism
پژوهشگران نادر قبادی

چکیده

We study tunnel barrier thickness effects on spintransfer 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.