Über die dicke von 180°-Blochwanden auf der oberfläche von kompakten siliziumeisen (on the thickness of 180°-Bloch walls on the surface of bulk silicon iron)

The 180°-Bloch wall on the surface of bulk silicon iron was studied by means of the magneto-optical Kerr effect. As the Bloch wall thickness amounts to about 1000-2000 Å, the structure of the wall cannot be dissolved by an optical microscope. Only a diffraction pattern may be obtained as image of the wall. Though the form of the diffraction pattern shows no relation to the wall structure, the brightness will increase with wall width. By this effect it should be possible to determine the wall thickness. In our experiment, a 180°-Bloch wall was studied on the