Magnetic Properties of Submonolayer Fe on Pd(110)
Abstract
We use SMOKE and RHEED to investigate the growth and magnetic properties of submonolayer Fe on a stepped Pd(110) in order to understand magnetic nanowire formation. Epitaxial Fe wedges were grown at 70^oC with MBE, where RHEED oscillations suggest that Fe atoms decorate the step edges to form the nanowires. The Fe films are ferromagnetic and exhibit polar Kerr hysteresis loops above 0.3 ML. They retain full remanence, within the error bars, at zero field at all temperatures before the phase transition. While the remanent magnetization Mr at 1 ML shows a normal temperature dependence with a well-defined Curie temperature Tc, Mr decays exponentially with increasing temperature at low coverages, i.e. at 0.36 ML. The extrapolated Tc initially increases sharply with coverage and starts to saturate at 0.8 - 1 ML to 210K, which can be described by finite size scaling relations.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2001
- Bibcode:
- 2001APS..MARG22005L