Generation Linewidth of an Auto-Oscillator with a Nonlinear Frequency Shift: Spin-Torque Nano-Oscillator

Images of a spin-torque-driven magnetic nano-oscillator.

We present the first space- and time-resolved images of the spin-torque-induced steady-state oscillation of a magnetic vortex in a spin-valve nanostructure. We find that the vortex structure in a nanopillar is considerably more complicated than the 2D idealized structure often-assumed, which has important implications for the driving efficiency. The sense of the vortex gyration is uniquely dete...

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...

Spin nano–oscillator–based wireless communication

Spin-torque nano-oscillators (STNOs) have outstanding advantages of a high degree of compactness, high-frequency tunability, and good compatibility with the standard complementary metal-oxide-semiconductor process, which offer prospects for future wireless communication. There have as yet been no reports on wireless communication using STNOs, since the STNOs also have notable disadvantages such...

Nanowire spin torque oscillator driven by spin orbit torques.

Spin torque from spin current applied to a nanoscale region of a ferromagnet can act as negative magnetic damping and thereby excite self-oscillations of its magnetization. In contrast, spin torque uniformly applied to the magnetization of an extended ferromagnetic film does not generate self-oscillatory magnetic dynamics but leads to reduction of the saturation magnetization. Here we report st...

Wireless current sensing by near field induction from a spin transfer torque nano-oscillator