Magnetization reversal of ultrathin Fe film grown on Si（111） using iron silicide template

Ultrathin Fe films were epitaxially grown on Si（lll） by using an ultrathin iron silicide film with p（2 × 2） surface reconstruction as a template. The surface structure and magnetic properties were investigated in situ by low energy electron diffraction （LEED）, scanning tunnelling microscopy （STM）, and surface magneto-optical effect （SMOKE）. Polar SMOKE hysteresis loops demonstrate that the Fe ultrathin films with thickness t 〈 6 ML （monolayers） exhibit perpen-dicular magnetic anisotropy. The characters of M-H loops with the external magnetic field at difference angles and the angular dependence of coercivity suggest that the domain-wall pinning plays a dominant role in the magnetization reversal process.第一段]

Magnetization reversal of ultrathin Fe film grown on Si(111) using iron silicide template

Ultrathin Fe films were epitaxially grown on Si(111) by using anultrathin iron silicide film with $p(2\times2$) surfacereconstruction as a template. The surface structure and magneticproperties were investigated in situ by low energy electrondiffraction (LEED), scanning tunnelling microscopy (STM), and surfacemagneto-optical effect (SMOKE). Polar SMOKE hysteresis loopsdemonstrate that the Fe ultrathin films with thickness $t<6$ ML(monolayers) exhibit perpendicular magnetic anisotropy. Thecharacters of $M$--$H$ loops with the external magnetic field atdifference angles and the angular dependence of coercivity suggestthat the domain-wall pinning plays a dominant role in themagnetization reversal process.