This report gives an outlook to the vortex magnetic state, in particular the study of its typical physical phenomena, met while simulating a circular shaped magnetic material and its applications into MTJs (magnetic tunnel junctions). \\ The subjects covered by this document range from the identification of the magnetic field interval of the vortex state, to the study of particular geometries like circles with flat or ellipses.\\ This work demonstrates that some geometries (like the ellipse) have physical advantages and have to be preferred when generating a vortex state into the sense layer of a MTJ (magnetic tunnel junction).