표면 광자기 커 효과를 이용한 Fe/Fe0.5Co0.5/Cu(001) 박막의 자기 이방성에 대한 연구

Abstract

The magnetic properties of Fe/Fe0.5Co0.5/Cu(001) system were investigated in this research. Fe/Cu(001) system is well studied as a complicated spin structure and magnetic properties for few mono-layer of Fe films. Also, it is well known that the Fe films, epitaxially grown on Cu(001) substrate show the perpendicular magnetic anisotropy below 11 ML region. According to recent theoretical research, however, there was an interesting result that the Fe/Co(<1 ML)/Cu(001) system have an slteration of magnetic anisotropy depend on the thickness of Fe film. So, with this concern, this study was carried out. This experiments performed the surface magneto-optic Kerr effect(SMOKE) experiment to find out the magnetic anisotropy of Fe/Fe0.5Co0.5/Cu(001) system. After several cycles of sputtering and annealing to prepare the Cu(001) single crystal, Fe/Fe0.5Co0.5 films were deposited by molecular beam epitaxy(MBE) and the magnetic properties were measured by SMOKE measurement. The whole experiments were performed in ultra high vaccum(UHV) chamber as in-situ growth and measurement..