Magnetic-field behavior of heterogeneous magnetic materials

Results on the investigation of the magnetic properties of nanocrystalline Co/Ni/Fe and Fe/Zr/Fe thin-film systems are presented. The study of the magnetic properties of the examined samples was carried out employing magneto-optical micromagnetometer with a surface sensitivity about of 20 nm of the thickness depth and a vibrating sample magnetometer. The examined samples were revealed to exhibit hysteresis loops of complicated forms. These data were explained by the magnetostatic and exchange interactions between the layers in heterogeneous magnetic materials.