Magnetic power inverter: AC voltage generation from DC magnetic fields

TL;DR

This paper introduces a novel method to generate AC voltages from DC magnetic fields by utilizing domain wall motion in ferromagnetic nanowires, enabling tunable power conversion based on spinmotive force.

Contribution

It presents a new device concept that converts DC magnetic energy into AC electrical signals through controlled domain wall dynamics in nanowires.

Findings

AC voltage frequency and amplitude can be tuned by magnetic fields and wire design.

The method leverages spinmotive force induced by domain wall motion.

A one-dimensional model demonstrates the feasibility of the approach.

Abstract

We propose a method that allows power conversion from DC magnetic fields to AC electric voltages using domain wall (DW) motion in ferromagnetic nanowires. The device concept relies on spinmotive force, voltage generation due to magnetization dynamics. Sinusoidal modulation of the nanowire width introduces a periodic potential for a DW the gradient of which exerts variable pressure on the traveling DW. This results in time variation of the DW precession frequency and the associated voltage. Using a one-dimensional model we show that the frequency and amplitude of the AC outputs can be tuned by the DC magnetic fields and wire-design.