The orientation of the magnetization and the occurrence of interfacial ferromagnetic inactive layers for ultrathin Co films grown on Ge(111) and Ge(100) surfaces have been studied using the in situ surface magneto-optic Kerr effect. On a Ge(111) substrate, cobalt films (≤28 monolayers) with in-plane easy axis of magnetization have been observed; however, on a Ge(100) substrate, ultrathin Co films (14-16 monolayers) with canted out-of-plane easy axis of magnetization were measured. The ferromagnetic inactive layers were formed due to the intermixing of Co and Ge and lowering the Curie temperature by reducing Co film thickness. The Co-Ge compound inactive layers were 3.8 monolayers thick for Co films grown on Ge(111) and 6.2 monolayers thick for Co films deposited on Ge(100). This is attributed to the difference of the density of surface atoms on Ge(111) and Ge(100).
|頁（從 - 到）||7130-7132|
|期刊||Journal of Applied Physics|
|出版狀態||已發佈 - 2001 六月 1|
|事件||8th Joint Magnetism and Magnetic Materials-Intermag Conference - San Antonio, TX, 美国|
持續時間: 2001 一月 7 → 2001 一月 11
ASJC Scopus subject areas
- 物理與天文學 (全部)