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

• 来源期刊: 中国物理B（英文版）
• 关键词: molecular beam epitaxy surface magnetism magnetization reversal Kerr effect
• 年，卷（期）: 2007,（11）
• 页码范围: 3541-3544
• 页数: 4页
• 语种: 英文

摘要

Ultrathin Fe films were epitaxially grown on Si(111) 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 perpendicular 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.