Pozorování magnetických domén metodami magneto-optické Kerrovy mikroskopie a mikroskopie magnetických sil

Abstract

Bachelor work is devoted to the Magnetic Force Microscopy (MFM) and Magneto-Optical Kerr Microscopy (MOKM), i. e. to the methods that are currently often used for observations of magnetic domains on the surfaces of magnetic materials. Both methods are described in details with emphasis on their principle and concrete way how to obtain the magnetic contrast. Work also summarizes their main advantages and disadvantages. Practical part of work includes examples of magnetic domain patterns observed on materials with broad application potential. Hard magnetic materials FeNbB(Tb, Dy) exhibit the coercive field up to 8 T and seem to be promising in the area of hard magnetic materials. Bilayered amorphous ribbons FeNbSiB/FeSiB prepared by planar flow casting process are soft magnetic materials with main applications in sensorics. Co2FeSi Heusler compounds are prepared by arc melting process in the form of ingots having different magnetic properties in comparison to the thin film samples of the same composition.