Field-like torque-induced tunable zero-field spin-torque nano-oscillator

Wireless current sensing by near field induction from a spin transfer 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...

Anomalous spin-orbit torque switching due to field-like torque–assisted domain wall reflection

Spin-orbit torques (SOTs) allow the electrical control of magnetic states. Current-induced SOT switching of the perpendicular magnetization is of particular technological importance. The SOT consists of damping-like and field-like torques, and understanding the combined effects of these two torque components is required for efficient SOT switching. Previous quasi-static measurements have report...

Fractional synchronization of spin-torque nano-oscillators.

We experimentally demonstrate a series of fractional synchronization regimes (Devil's staircase) in a spin-torque nano-oscillator driven by a microwave field. These regimes are characterized by rational relations between the driving frequency and the frequency of the oscillation. An analysis based on the phase model of auto-oscillator indicates that fractional synchronization becomes possible w...