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).

中文翻译：

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SquidLab — 用于背景扣除和磁化数据拟合的用户友好程序

我们提供了一个开源程序，可免费下载供学术使用，具有完整的用户友好图形界面，用于对磁化数据执行灵活而强大的背景减法和偶极拟合。对于具有小磁矩大小的磁性样品或具有大或不对称磁背景的样品环境，在拟合偶极信号以提取磁矩之前，有必要将背景和样品对每个测量的原始电压测量的贡献分开。SquidLab 最初设计用于 Quantum Design MPMS3 SQUID 磁力计上的压力传感器，是在 Matlab 中实现的模块化面向对象平台，具有一系列用于不同广泛可用磁力计系统（包括 MPMS、MPMS-XL、MPMS-IQuantum、MPMS3 , 和 S700X 型号），并且已经过各种背景和信号类型的测试。该软件允许使用 Levenberg-Marquardt 非线性最小二乘法或奇异值分解线性代数算法对基线信号进行背景扣除、信号预处理和对偶极数据执行拟合，该算法擅长挑选嘈杂或弱偶极信号。插件系统允许用户使用自己的导入器、进程或拟合算法轻松扩展内置功能。SquidLab 可以在学术许可下从华威大学存储库 (wrap.warwick.ac.uk/129665) 下载。并使用 Levenberg-Marquardt 非线性最小二乘法或奇异值分解线性代数算法对偶极子数据进行拟合，该算法擅长挑选嘈杂或弱偶极子信号。插件系统允许用户使用自己的导入器、进程或拟合算法轻松扩展内置功能。SquidLab 可以在学术许可下从华威大学存储库 (wrap.warwick.ac.uk/129665) 下载。并使用 Levenberg-Marquardt 非线性最小二乘法或奇异值分解线性代数算法对偶极子数据进行拟合，该算法擅长挑选嘈杂或弱偶极子信号。插件系统允许用户使用自己的导入器、进程或拟合算法轻松扩展内置功能。SquidLab 可以在学术许可下从华威大学存储库 (wrap.warwick.ac.uk/129665) 下载。