Growth and Magnetic Properties of Ultrathin Fe on Pd(110).

Cuenya, B. R. ; Pearson, J. ; Yu, C. ; Li, D. ; Bader, S. D.

Technical Information Center Oak Ridge Tennessee

关键词: Iron;    Magnetization;    Ultrathin;    Growth;    Magnetic properties;   

RP-ID  :  DE2001768577

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We have investigated the growth and magnetic properties of O-3ML (monolayer) Fe on stepped Pd(l 10) with reflection high-energy electron diffraction (RHEED), low energy electron diffraction (LEED) and the surface magneto-optic Kerr effect (SMOKE) in order to relate the morphology, structure and magnetic properties in a low-dimensional system. The Fe films, grown at 340 K, are smooth and pseudomorphic up to 1.5 ML, where three-dimensional growth and lateral lattice relaxation ensues. The in-plane row spacing along the (110) decreases by -5-6 % at 3 ML. RHEED oscillations with l-ML period are observed in the (1,0), (2,0) and the center of the (0,0) streak intensity. The tail of the (0,0) streak at low exit angle, however, has a 0.5-ML period oscillation, which suggests step decoration growth. Submonolayer Fe films remain ferromagnetic above -0.3 ML. The magnetic easy axis is initially perpendicular to the surface and is in-plane for Fe thickness >1.5 ML. Between 0.9- 1.2 ML, there appear to be mixed magnetic phases as indicated by an increase in coercivity.