On-chip detection of ferromagnetic resonance of a single submicron permalloy strip

TL;DR

This paper demonstrates on-chip detection of ferromagnetic resonance in a single submicron permalloy strip using inductive flux detection, confirming the uniform magnetization precession mode with results matching theoretical predictions.

Contribution

It introduces a novel on-chip method for detecting ferromagnetic resonance in a single submicron ferromagnetic element, enabling precise magnetic dynamics studies.

Findings

Resonance frequency matches Kittel formula predictions.

Successful detection of magnetization precession mode.

Method confirms uniform precession in submicron ferromagnetic strips.

Abstract

We measured ferromagnetic resonance of a single submicron ferromagnetic strip, embedded in an on-chip microwave transmission line device. The method used is based on detection of the oscillating magnetic flux due to the magnetization dynamics, with an inductive pick-up loop. The dependence of the resonance frequency on applied static magnetic field agrees very well with the Kittel formula, demonstrating that the uniform magnetization precession mode is being driven.