Magnetic behavior of Fe nanostructures on a vicinal Au(1 1 1) surface have been investigated by X-ray magnetic circular dichroism (XMCD) measurements. It is found that one-dimensional (1D) Fe chains of 2-3 atomic rows exhibit a ferromagnetic long-range order, and have a larger orbital moment in comparison with stripes and two-dimensional (2D) nanostructures. From the temperature-dependent XMCD measurements, the 1D chains exhibit two phase transitions, which are qualitatively ascribed to a ferromagnetic-to- superparamagnetic and a superparamagnetic-to-paramagnetic phase transions. These results suggest that the magnetism of the 1D chains behaves superparamagnetically.
|Number of pages||5|
|Journal||Journal of Electron Spectroscopy and Related Phenomena|
|Publication status||Published - 2005 Jun|
- Nanowire X-ray magnetic circular dichroism
- Vicinal surface