Coupling efficiency for phase locking of a spin transfer nano-oscillator to a microwave current.

نویسندگان

  • B Georges
  • J Grollier
  • M Darques
  • V Cros
  • C Deranlot
  • B Marcilhac
  • G Faini
  • A Fert
چکیده

The phase locking behavior of spin transfer nano-oscillators (STNOs) to an external microwave signal is experimentally studied as a function of the STNO intrinsic parameters. We extract the coupling strength from our data using the derived phase dynamics of a forced STNO. The predicted trends on the coupling strength for phase locking as a function of intrinsic features of the oscillators, i.e., power, linewidth, agility in current, are central to optimize the emitted power in arrays of mutually coupled STNOs.

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

Optical and X-ray Measurement of Magnetization Dynamics Induced by Spin Currents

Pure spin currents provide new opportunities for the construction of energy efficient electronic devices with novel functionality. In particular, spin currents are able to control the magnetization of ferromagnetic materials that are inherently bistable, and therefore ideally suited to memory and logic applications, or capable of sustained oscillation at microwave frequencies. However, present ...

متن کامل

Phase-Lock Requirements in a Serial Array of Spin Transfer Nano-Oscillators

The most promising approach to attain a narrow linewidth and a large output power simultaneously in spin torque oscillators is self-phase-locking of an array of oscillators. Two long range coupling mechanisms, magnetostatic interaction and self-induced current, are explored. Synchronization occurs with MR ratio ~ 14% and volume ~ 2.1 × 10(-5) μm(3) at room temperature for an experimental freque...

متن کامل

The Transient Behavior of LC and Ring Oscillators under External Frequency Injection

 In this work, time domain analysis is used to solve Adler’s equation in order to obtain the required time, for an oscillator under external injection, reaching the steady-state condition. Mathematical approach has been applied to fully describe the transient of frequency acquisition in injection-locked LC and Ring oscillators considering their time-varying nature. Then, the analysis is verifie...

متن کامل

Spin Torque Nano Oscillator for Blueshift and Redshift Detections

Oscillator is the most essential part in the communication, navigation and measurement systems. We propose a spin torque nano oscillator (STNO) which offers the possibility of using the transfer of spin angular momentum via spin polarized current to generate microwave signal. Using this STNO, our simulation result demonstrates that the current dependence of the oscillation frequency changes can...

متن کامل

Ultralow-current-density and bias-field-free spin-transfer nano-oscillator

The spin-transfer nano-oscillator (STNO) offers the possibility of using the transfer of spin angular momentum via spin-polarized currents to generate microwave signals. However, at present STNO microwave emission mainly relies on both large drive currents and external magnetic fields. These issues hinder the implementation of STNOs for practical applications in terms of power dissipation and s...

متن کامل

ذخیره در منابع من

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


  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:
  • Physical review letters

دوره 101 1  شماره 

صفحات  -

تاریخ انتشار 2008