Multiple modes of a single spin torque oscillator under the non-linear region

TL;DR

This paper numerically investigates a single spin-torque oscillator in the non-linear region, revealing it can generate multiple discrete modes from a single eigenmode, which could enable new spintronic logic functionalities.

Contribution

It demonstrates that a single spin-torque oscillator can produce multiple modes without feedback or coupling, expanding potential applications in spintronic logic circuits.

Findings

A large angle precession induces multiple modes.

A single eigenmode can trigger up to six discrete modes.

Multiple modes occur without external feedback or magnetic coupling.

Abstract

A numerical investigation is conducted for a single spin-torque oscillator under the non-linear region. A large angle precession triggers the generation of multiple modes without any feedbacked circuits and/or magnetic couplings with neighboring oscillators. Our simulations show that a single eigenmode of a given spin-torque oscillator can trigger up to six discrete modes as the sideband modes. These findings will offer the new functionality to the STO for developing the spintronic logic circuits.