Dataset for "Magnetization reversal mechanism of double-helix nanowires probed by dark-field magneto-optical Kerr effect"

About the dataset

This dataset accompanies the publication “Magnetization reversal mechanism of double-helix nanowires probed by dark-field magneto-optical Kerr effect”.

The dataset contains experimental microscopy images, dark-field magneto-optical Kerr effect (DF-MOKE) measurements, ptychographic X-ray magnetic circular dichroism (XMCD) data, micromagnetic simulation results, and processed data used to generate the figures presented in the publication. The dataset is organized into folders corresponding to the figures in the manuscript.

It contains experimental images, simulation results, and processed data used to generate the figures presented in the publication.

Dataset structure and file formats

The dataset is divided into directories named after the corresponding figures in the publication (Fig1, Fig2, Fig3, Fig4, FigS1, FigS2).

The dataset includes:

• .png image files containing SEM images and visualization outputs,
• .dat text files containing experimental and simulated numerical data,
• .vtu files containing micromagnetic simulation data for visualization in software such as ParaView,
• .npz NumPy archive files containing processed XMCD and image-analysis data.

Python with NumPy is recommended for opening .npz files.

Data and file overview

1) Fig. 1

Contains an SEM image of the fabricated double-helix nanowires used for Fig. 1.

2) Fig. 2

Contains DF-MOKE experimental data and fitted data used for Fig. 2.

3) Fig. 3

Contains simulation data and VTU files used for Fig. 3.

4) Fig. 4

Contains ptychographic XMCD data processed from CR and CL reconstructions, including aligned and normalized XMCD images, averaged XMCD data as a function of the external magnetic field, and simulated XMCD signals used for Fig. 4.

5) Fig. S1

Contains an SEM image used for the diameter analysis of the nanowires and the processed data used for Fig. S1.

6) Fig. S2

Contains a phase image of the double-helix nanowires used for Fig. S2.