Nice Master thesis by Václav Jelínek, defended in June 2025 (supervised by David Novotný from MAGLAB).
In the development of high precision magnetometers, it is essential to minimize the effect of magnetic field disturbances that may be caused by electronic components in the vicinity of the magnetometer. This thesis focuses on the development of a dedicated device to analyse the magnetic remanence of electronic components to facilitate component selection in magnetometer design. The developed device includes a platform for placing the component to be analyzed and a pair of sensitive fluxgate magnetometers designed to detect the magnetic field generated by the component. The platform with the component rotates about two mutually perpendicular axes, while measuring changes in the magnetic field. Based on the measured data, the magnetic moment vector of the component under analysis is estimated using the least squares method. The functionality of the magnetic moment estimation algorithm was verified by measuring a sample with a known magnetic moment. Furthermore, six commonly used electronic components were analyzed and non-zero magnetic remanence was detected in five of them. The developed device represents a practical and affordable instrument for identifying the magnetic remanence of electronic components and can contribute to the optimization of the design of high precision magnetometers.
You can find more detailed information if you look for “Device for measuring magnetic remanence of electronic components” at https://dspace.cvut.cz/