InP(001)(2×4) 재구성된 표면 위에 원자층 단위로 증착된 Co 박막의 자성 특성

다국어 초록 (Multilingual Abstract)

We have investigated magnetic properties of monolayer (ML)-thickness Co film deposited on InP(2×4) reconstruction surface using in situ Surface Magneto-Optical Kerr Effects (SMOKE) measurement system. InP(2×4) reconstruction surface, obtained by repeated sputtering and annealing, was confirmed by reflection high energy electron diffraction (RHEED) and scanning tunneling microscope (STM) measurements. From both longitudinal and polar SMOKE measurements, we have observed three distinguishable regions showing different magnetic properties depending on the Co thickness. In the Co film thickness smaller than 7 ML, no SMOKE signal was detected. In the following thickness between 8 ML and 15 ML, both longitudinal and polar Kerr hysteresis loops were observed, which implies a metastable phase coexisted of in-plane and perpendicular anisotropies. In the film thickness larger than 16 ML, only longitudinal MOKE signal without polar signal was detected, which implies existence of in-plane anisotropy in this thickness region.

참고문헌 (Reference)

1 "Compd. Semicond." 3 : 30-, 1997

2 "Appl. Phys. Lett. 56" 665 : 1990