SquidLab - a user-friendly program for background subtraction and fitting of magnetization data

We present an open-source program with 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 an MPMS3 magnetometer, SquidLab is a modular object-oriented platform implemented in Matlab with a range of importers for different widely-available magnetometer systems 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. A plugin system allows users to easily extend the built-in functionality with their own importers, processes or fitting algorithms.

 

With over 500 downloads already to a rich variety of labs worldwide - SquidLab is proving an indispensible tool for high-pressure magnetic measurements and a whole host of other applications.