Implementation of an automated FORC analysis and anisotropy measurements in a homemade VSM

P. N. GRANELL; M. R. PAGNOLA; L. G. PAMPILLO; F.D. SACCONE

Manizales, Colombia

Workshop; Poster; 2010

Universidad Nacional de Colombia sede Manizales

There are different techniques that are useful to evaluate hysteresis cycles,from which it is possible to determine magnetic properties such as saturation, remanence, coercive field and maximum energy product. In particular, the most widely used are those that evaluate the electromotive force (emf) induced in sensor coils that collect changes in magnetic flux, resulting from the variation of the magnetisation of the sample with the applied field. Based in this principle, the vibrating sample magnetometers (VSM) became popular equipments in laboratories devoted to research in magnetic materials, since Foner[1] introduced its workability. In a VSM, the sample oscillates around an equilibrium position and this movement induces the emfsensed by coils. Applied fields induce changes in magnetisation and in this way hysteresis loops are measured.