1. ABOUT THE DATASET -------------------- Title: Creator(s): Christopher E A Barker [1], Simone Finizio [2], Eloi Haltz [1], Sina Mayr [2,3], Philippa M Shepley [1], Thomas A Moore [1], Gavin Burnell [1], Joerg Raabe [2] and Christopher H Marrows [1] Organisation(s): [1] School of Physics and Astronomy, University of Leeds. [2] Paul Scherrer Institute, Switzerland. [3] Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, Switzerland. Rights-holder(s): Copyright 2023 University of Leeds Publication Year: 2023 Description: Dataset associated with publication on SAF domain wall motion. Dataset contains data on magnetisation vs field and magnetisation vs temperature collected on a quantum design SQUID VSM, and data collected on the PolLux endstation of the Swiss Lightsource, containing a mix of full XMCD images of domain walls in a SAF microwire, and single STXM images where the domain wall motion is calculated from the difference between each subsequent image. Cite as: C E A Barker et al., (2023): Dataset associated with 'Domain wall motion at low current density in a synthetic antiferromagnet nanowire'. University of Leeds. [Dataset] https://doi.org/10.5518/1380. Related publication: C E A Barker et al. 2023 J. Phys. D: Appl. Phys. https://doi.org/10.1088/1361-6463/ace6b4 Contact: Corresponding author is Christopher H Marrows: christopher.h.marrows@leeds.ac.uk 2. TERMS OF USE --------------- Copyright 2023 University of Leeds, Paul Scherrer Institute. Unless otherwise stated, this dataset is licensed under a Creative Commons Attribution 4.0 International Licence: https://creativecommons.org/licenses/by/4.0/.] 3. PROJECT AND FUNDING INFORMATION ---------------------------------- Title: Synthetic Antiferromagnetic Skyrmions Dates: 01 March 2020 - 31 December 2023 Funding organisation: EPSRC Grant no.: EP/T006803/1 C E A Barker acknowledges support from the National Physical Laboratory. We acknowledge support from the Sir Henry Royce Institute for access to the the Royce Deposition System for sample growth. Part of this work was performed at the PolLux (X07DA) beamline of the Swiss Light Source, Paul Scherrer Institut, Villigen PSI, Switzerland. The research leading to these results received funding REFERENCES 7 from the European Community’s Seventh Framework Programme (No. FP7/2007-2013) under Grant Agreement No. 290605 (PSI-FELLOW/COFUND), the Swiss National Science Foundation under Grant Agreement No. 172517 4. CONTENTS ----------- File listing -SQUID VSM DATA -Figure 2 -MET20210528-01.dat: SQUID VSM Datafile, containing 26 lines of metadata, and then the data in comma separated values. Relevant columns for this data set are (zero-indexing): column 3: magnetic field, and column 4 and 5: moment and moment error respectively. -Figure 6 All files contain moment vs temperature for the three samples: -CoB_MvT.dat: SAF sample structure, but with all the CoFeB layers left out, so the repeat unit is [Ru/Pt/CoB/Ru/Pt] -CoFeB_MvT.dat: SAF sample structure but with all the CoFeB layers left out, so the repeat unit is [Ru/Pt/Ru/Pt/CoFeB] -CoFeB_CoB_SAF_MvT.dat: Full SAF sample. -Pollux Data -Figure 6 -temp_vs_time.dat: time resolved XMCD signal at the Fe L3 edge, converted to the temperature of the wire using the CoFeB MvT SQUID data, against time of the measurement. -logs This folder contains a number of logfiles that relate to the history of the sample images in the next folder. Each logfile contains commands relating to the voltage of the pulse sent through the wire, the changing of the polarisation of the X-rays, or the acquisition of the images. Using these along with the images themselves it is possible to reconstruct the data. -Sample Images These two folders contain the sample images from the two days of the experiment, and relate to the image numbers in the logfiles in the folder above. They are named in the format Sample_Image_2021-06-10_XXX.hdf5 where XXX is the number from the logfile. They can be accessed using a set of open-access MATLAB scripts provided by PSI: https://gitlab.psi.ch/microspectro-public -SetV-ActV_LookupTable.txt: This is a lookup table to convert the set voltages that are listed in the logs to the actual voltage measured on the oscilloscope during the experiment. 5. METHODS ---------- Data for figure 2 was taken in a quantum design MPMS3 SQUID VSM at room temperature. Sample was loaded in the orientation perpendicular to the field, and measured in a full loop from positive saturation. Data for figures 3,4,5 was taken at the Pollux endstation of the swiss light source. The sample was connected to a pulse generator to be able to send pulses along the wire. The data was collected by taking a single STXM, pulsing along the wire and then taking a second STXM, thus the domain motion could be calculated based on the difference between the two STXM images. The data for figure 6 was taken on the SQUID VSM for the MvT, where the sample was measured in a field of 200 mT from 350K down to 10K. The time resolved measurements were done on the Pollux endstation of the SLS, and then converted to temperature based on the CoFeB data from the VSM.