Broadband Setup for Magnetic-Field-Induced Domain Wall Motion in Cylindrical Nanowires

TL;DR

This paper presents a broadband setup using a coplanar waveguide to generate magnetic field pulses for precise measurement of domain wall motion in cylindrical nanowires, improving accuracy and field control.

Contribution

It introduces a novel coplanar waveguide-based method for triggering domain wall motion, enhancing measurement precision and eliminating bias in domain wall speed estimation.

Findings

Successful implementation for magnetic force microscopy

Effective magnetic field pulse generation demonstrated

Improved accuracy in domain wall speed measurement

Abstract

In order to improve the precision of domain wall dynamics measurements, we develop a coplanar waveguide-based setup where the domain wall motion should be triggered by pulses of magnetic field. The latter are produced by the Oersted field of the waveguide as a current pulse travels toward its termination, where it is dissipated. Our objective is to eliminate a source of bias in domain wall speed estimation while optimizing the field amplitude. Here, we present implementations of this concept for magnetic force microscopy (MFM) and synchrotron-based investigation.