Spin-transfer switching in spin valve nanopillars RESEARCH SEMESTER REPORT
نویسنده
چکیده
منابع مشابه
Precessional modes due to spin-transfer in spin-valve nanopillars
Current-driven magnetic switching and magnetic dynamics in spin-valve nanopillars are considered in the framework of the macrospin model. The corresponding spin transfer torque is calculated in terms of the macroscopic model based on spin diffusion equations. Critical currents for switching from parallel to antiparallel magnetic configurations and to precessional regime are derived. Frequencies...
متن کاملSpin-transfer assisted thermally activated switching distributions in perpendicularly magnetized spin valve nanopillars
We present switching field distributions of spin-transfer assisted magnetization reversal in perpendicularly magnetized Co/Ni multilayer spin-valve nanopillars at room temperature. Switching field measurements of the Co/Ni free layer of spin-valve nanopillars with a 50 nm× 300 nm ellipse cross section were conducted as a function of current. The validity of a model that assumes a spin-current d...
متن کاملSpin Transfer in Magnetic Nanopillars
This thesis describes experimental studies of spin-transfer induced magnetization switching and dynamics in bilayer magnetic nanopillars. Known as the spin transfer effect, a spin-polarized current can transfer its angular momentum to a magnetic layer, resulting in its reversal as well as microwave dynamics. It has become a major focus in both physics and technology. Our nanostructured spin val...
متن کاملTime-resolved spin-torque switching and enhanced damping in permalloy/Cu/permalloy spin-valve nanopillars.
We report time-resolved measurements of current-induced reversal of a free magnetic layer in Permalloy/Cu/Permalloy elliptical nanopillars at temperatures T=4.2 K to 160 K. Comparison of the data to Landau-Lifshitz-Gilbert macrospin simulations of the free layer switching yields numerical values for the spin torque and the Gilbert damping parameters as functions of T. The damping is strongly T ...
متن کاملQuantitative study of magnetization reversal by spin-polarized current in magnetic multilayer nanopillars.
We have studied magnetic switching by spin-polarized currents and also the magnetoresistance in sub-100-nm-diam thin-film Co/Cu/Co nanostructures, with the current flowing perpendicular to the plane of the films. By independently varying the thickness of all three layers and measuring the change of the switching currents, we test the theoretical models for spin-transfer switching. In addition, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2010