Magneto-Optical Investigation of Thin-Film Magnetic Systems

Abstract

Results on the investigation of magnetic and magneto-optical properties of nanocrystalline Fe/Zr and Fe/Zr, Mo/Fe thin-film systems are presented. The examined samples were prepared by DC magnetron sputtering technique. The structural investigations of the samples were performed by X-ray diffraction analysis. The hysteresis loops and spectral dependencies of the transverse Kerr effect were measured employing the magneto-optical magnetometer and the magneto-optical spectrometer, respectively. The influence of the Zr and Mo layer thickness on the magnetic and magneto-optical properties of the examined samples was observed.

Influence of Bi on the magnetic and magneto-optical properties of Co/Bi/Co and Bi/Co thin-film systems

“…4. According to previously reported experimental data [6][7][8] and calculations, 25) the double-stage and almost rectangular hysteresis loops are observed for antiparallel and parallel orientations of magnetization components in cobalt layers. Thus, the dependences of H C (t Bi ) and H S (t Bi ) for the Co=Bi=Co samples suggest the existence of ferromagnetic (F) and antiferromagnetic (AF) exchange interactions between Co ferromagnetic layers through the Bi interlayer.…”

“…These data denote that the texture of the Bi layer is enhanced with increasing t Bi that in turn enhances the texture of the magnetic film deposited onto a bismuth layer. 6) It was experimentally found 24) that the values of saturation field and coercivity increase with the enhancement of the texture of magnetic thin-film samples. Thus, the increases in the coercivity and saturation field of the Bi=Co and Co=Bi=Co samples with increasing t Bi , and also the differences in H S and H C values between the bilayer and trilayer samples are caused by the influence of the textured Bi layer.…”