Automatic Alignment Methods for VSM Using Magnetic Samples with Reduced Time and Higher Precision
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Vibrating Sample Magnetometers (VSM) are used to measure the magnetic properties of ferro or ferrimagnetic materials. They have a wide range of users in both industry and in universities. Currently VSMs require a manual alignment for each sample loaded in the instrument. If the sample is not centered within the pickup coils, systematic errors are introduced into the data. Centering the sample requires significant time to complete and needs to be repeated after each field angle, field or temperature change. For this thesis project an automatic alignment system was designed, implemented and tested. The system measures the position of the sample after each field angle change and corrects for sample shifts after a field angle change avoiding large systematic errors in the My signal.