Coak, Matthew John, Liu, Cheng, Jarvis, David M., Park, Seunghyun, Cliffe, Matthew J. and Goddard, Paul A. (2020) Data for SquidLab : a user-friendly program for background subtraction and fitting of magnetization data. [Dataset]

	Archive (ZIP) (Zip archive) DataArchive.zip - Published Version Available under License Creative Commons Attribution 4.0. Download (57Mb)
	Plain Text (Readme file) Readme.txt - Published Version Available under License Creative Commons Attribution 4.0. Download (1897b)

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Abstract

We present an open-source program free to download for academic use with a full user-friendly graphical interface for performing flexible and robust background subtraction and dipole fitting on magnetization data. For magnetic samples with small moment sizes or sample environments with large or asymmetric magnetic backgrounds, it can become necessary to separate background and sample contributions to each measured raw voltage measurement before fitting the dipole signal to extract magnetic moments. Originally designed for use with pressure cells on a Quantum Design MPMS3 SQUID magnetometer, SquidLab is a modular object-oriented platform implemented in Matlab with a range of importers for different widely available magnetometer systems (including MPMS, MPMS-XL, MPMS-IQuantum, MPMS3, and S700X models) and has been tested with a broad variety of background and signal types. The software allows background subtraction of baseline signals, signal preprocessing, and performing fits to dipole data using Levenberg–Marquardt non-linear least squares or a singular value decomposition linear algebra algorithm that excels at picking out noisy or weak dipole signals. A plugin system allows users to easily extend the built-in functionality with their own importers, processes, or fitting algorithms. SquidLab can be downloaded, under Academic License, from the University of Warwick depository (wrap.warwick.ac.uk/129665).

Item Type:	Dataset
Subjects:	Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Type of Data:	Simulation data
Library of Congress Subject Headings (LCSH):	SquidLab , Computer programming, Magnetism, Magnetism -- Data processing, Magnetism -- Computer simulation, Magnetometers
Publisher:	University of Warwick, Department of Physics
Official Date:	2 March 2020
Dates:	Date Event 2 March 2020 Published
Status:	Not Peer Reviewed
Publication Status:	Published
Media of Output (format):	.txt
Access rights to Published version:	Open Access (Creative Commons)
Copyright Holders:	University of Warwick
Description:	Data Archive contains the following directories: - 2018-05-02_4p8kN VI3 piston cylinder cell - 2018-05-06_VI3_cell2_BackgroundScan1_55p68mm - 2018-05-07_VI3_cell2_BackgroundScan2_55p52mm - 2018-05-07_VI3_cell2_BackgroundScan3_56p68mm - 2018-05-07_VI3_cell2_BackgroundScan4_55p88mm - SquidLab - Test_data_Matt_Cliffe Matlab figure files of the figures shown in the publication (from which the data can be extracted if opened in Matlab). - SquidLab: this folder contains the source code files, of the version at time of publication. Note that the latest up-to-date version of the codebase will always be hosted at http://wrap.warwick.ac.uk/129665/ '2018-05-02' at the start of a datafile or directory gives the date, year-month-day, on which the measurement was taken. '4p8kN' refers to the load applied to the pressure cell in which the measurement was done. (kilo-Newtons). '55p68mm' refers to the measured total length of the empty pressure cell used for the background scans. The length of the loaded and empty cells must be matched, not the pressure, so this is the key parameter. '2018-05-02_4p8kN VI3 piston cylinder cell' had length 55.50mm, so BackgroundScan2 is appropriate. Each file is an MPMS3 datafile or raw datafile, which readers should be familiar with, and have clearly labelled data columns. '2018-05-02_BackgroundSubtracted_VI3_sample2_SQUIDcell2_4p8kN_MvT_2to300K_ZFC_1000Oe_Royce.txt' is however two columns, exported from SquidLab, of just Temperature, K and Moment, emu. Folder 'Test_data_Matt_Cliffe' are the example data on the Cu(NCS)2 sample, again in MPMS3 data files. Some extra plots are included, as pngs, but are not essential.
Date of first compliant deposit:	2 March 2020
Date of first compliant Open Access:	2 March 2020
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID UNSPECIFIED [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 UNSPECIFIED Jesus College, University of Cambridge http://dx.doi.org/10.13039/501100000644 IBS-R009-G1 Institute for Basic Science http://dx.doi.org/10.13039/501100010446 681260 H2020 European Research Council http://dx.doi.org/10.13039/100010663
Related URLs:	Related item in WRAP Other
Contributors:	Contribution Name Contributor ID Depositor Coak, Matthew John 94376

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