Spintronic Oscillator Based on Magnetic Field Feedback

TL;DR

This paper introduces a novel spintronic oscillator design utilizing magnetic field feedback from a magnetic tunnel junction, enabling sustained magnetization precession driven by a feedback loop and critical current.

Contribution

It presents a new circuit design for a spintronic oscillator that leverages magnetic field feedback to achieve continuous magnetization precession.

Findings

Achieves sustained magnetization precession with feedback loop.

Demonstrates critical current threshold for oscillation.

Provides a practical circuit implementation for spintronic oscillators.

Abstract

We present a circuit design of a spintronic oscillator based on magnetic tunnel junction. In this design, a dc current is passed through a magnetic tunnel junction which is connected to a feed-back wire below it. Any fluctuation in the magnetization direction of the free layer of MTJ, drives a fluctuating current through the feed-back wire, which exerts a magnetic field on the free layer. This in turn can amplify the magnetization fluctuations of the free layer. If the dc current passing through the MTJ is more than a critical value, continuous precessing states of the magnetization are possible.