Spin transfer nano-oscillators

Abstract

The use of spin transfer nano-oscillators (STNOs) to generate microwave signal in nanoscale devices have aroused tremendous and continuous research interest in recent years. Their key features are frequency tunability, nanoscale size, broad working temperature, and easy integration with standard silicon technology. In this feature article, we give an overview of recent developments and breakthroughs in the materials, geometry design and properties of STNOs. We focus in more depth on our latest advances in STNOs with perpendicular anisotropy showing a way to improve the output power of STNO towards the μW range. Challenges and perspectives of the STNOs that might be productive topics for future research were also briefly discussed.

11 pages, 10 figures, nanoscale 2013

References in corpus (13)

• Spin Transfer Torques
• Bias-driven large power microwave emission from MgO-based tunnel magnetoresistance devices
• Excitations of incoherent spin-waves due to spin-transfer torque
• Current-driven vortex oscillations in metallic nanocontacts
• Generation linewidth of an auto-oscillator with a nonlinear frequency shift: Spin-torque nano-oscillator
• Coupling efficiency for phase locking of a spin transfer oscillator to a microwave current
• Large-amplitude coherent spin waves exited by spin-polarized current in nanoscale spin valves
• Microwave power generated by a spin-torque oscillator in the presence of noise
• Strong linewidth variation for spin-torque nano-oscillators as a function of in-plane magnetic field angle
• Experimental Test of Analytic Theory of Spin Torque Oscillator Dynamics
• Direct experimental measurement of phase-amplitude coupling in spin torque oscillators
• Micromagnetic study of a spin-torque oscillator based on a magnetic nano-contact magnetized at an arbitrary angle
• Spin-Torque-Induced Rotational Dynamics of a Magnetic Vortex Dipole