Hysteresis and Domain Patterns in Magneto-Optical Materials

Introduction

The aim of the experiment Hysteresis and Domain Patterns in Magneto-Optical Materials was to investigate the formation of magnetic domains in magnetisable materials. In particular a Magneto-Optical-Magnetometer (MOM) was employed to obtain hysteresis loops for various samples and a single sample was used for viscosity analysis. Magnetic domain formation was then observed for a particular sample using a Kerr microscope. It was discovered that the domains have a tendency to form in the same locations each time the sample is magnetised.

Figure 1. Capture showing the process of nucleation during domain formation (colours inverted).

Produced by Philip Schrader and Anthony Milton 2006.