Lithography-free study of spin torque

نویسنده

  • E. Murè
چکیده

We developed a non-lithographic technique to contact sub-100nm nanowires for spin transfer torque experiments. Co/Cu multilayers were grown by electrodeposition in nanoporous commercial polycarbonate membranes from a Co/Cu bath. A home-made sample holder allows bottom and top electrical contacts to be made to individual nanowires in the CPP geometry. Experimental evidence of the spin transfer torque effect is given for (Co/Cu)n multilayers by recording dV/dI spectra as a function of the DC current amplitude. & 2009 Elsevier B.V. All rights reserved.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Efficient High-Frequency Spin-Torque Oscillators Composed of Two Three-Layer MgO-MTJs with a Common Free Layer

We present a novel spin-torque oscillator based on two three-layer MgO-MTJs with a shared free layer. By performing extensive micromagnetic simulations we found that the structure exhibits a wide tunability of oscillation frequencies from a few GHz to several tens of GHz. We discuss the optimization of such structures in order to obtain the maximum output power. Keywords—spin-torque; oscillator...

متن کامل

Spin torque, tunnel-current spin polarization, and magnetoresistance in MgO magnetic tunnel junctions.

We employ the spin-torque response of magnetic tunnel junctions with ultrathin MgO tunnel barrier layers to investigate the relationship between spin transfer and tunnel magnetoresistance (TMR) under finite bias, and find that the spin torque per unit current exerted on the free layer decreases by < 10% over a bias range where the TMR decreases by > 40%. This is inconsistent with free-electron-...

متن کامل

Time-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 کامل

Geometry Optimization of Spin-Torque Oscillators Composed of Two MgO-MTJs with a Shared Free Layer

New types of spintronics devices utilizing all-electrical magnetization manipulation by current, such as spin-torque transfer RAM and spin-torque oscillators, have been developed based on MgO magnetic tunnel junctions (MTJs) with a large magneto-resistance ratio [1]. Spin-torque oscillators based on a single MTJ with in-plane magnetization [2] show high frequency capabilities, but still need an...

متن کامل

Concept of a Bias-Field-Free Spin-Torque Oscillator Based on Two MgO-MTJs

We propose a novel spin-torque oscillator based on two MgO-MTJs with a shared free layer. By performing extensive micromagnetic modeling we found that the structure exhibits a wide tunability of oscillation frequencies from a few GHz to several ten GHz.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2010