MEHRSCHICHTENSYSTEM FUER MAGNETORESISTIVE SENSOREN UND VERFAHREN ZU DESSEN HERSTELLUNG

摘要

The multi-layer system (2) with magneto-resistive properties disclosed has at least two thin ferromagnetic layers (3, 4) with, between them, a thin non-magnetic layer (5). The invention calls for the thickness (d) of this non-magnetic intermediate layer (5) to have a pre-determined value which is dependent on a discrete transition between ferromagnetic behaviour and anti-ferromagnetic behaviour of the multi-layer structure (2). The thickness (d) of the non-magnetic intermediate layer can be conveniently defined by observing the domain pattern as a function of the layer thickness (d), making use of the magneto-optic Kerr effect.