IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Magnetic Interfaces and Nanostructures Friday Sessions
       Session MI+SS-FrM

Paper MI+SS-FrM7
High Dipolar Magnetic Moment Observed on Ni/Cu(111) Nanostructures by Magnetic Circular X-ray Dichroism

Friday, November 2, 2001, 10:20 am, Room 110

Session: Magnetic Thin Films and Surfaces II
Presenter: C. Boeglin, IPCMS-CNRS, France
Authors: C. Boeglin, IPCMS-CNRS, France
S. Stanescu, IPCMS-CNRS, France
S. Cherifi, IPCMS-CNRS, France
A. Barbier, CEA/DRFMC, France
N.B. Brookes, ESRF, France
P. Ohresser, LURE-CNRS, France
J.P. Deville, IPCMS-CNRS, France
Correspondent: Click to Email
The correlation between ultrathin film growth, structure and morphology and the induced magnetic properties is of fundamental interest in order to improve the theoretical understanding of magnetic properties in ultra-thin films. We report here growth and morphology studies at the first stages of growth of Ni on a Cu(111) single crystal substrate. This work has been performed by in-situ Auger, RHEED and STM at room temperature. The morphology shows in the early stages of the growth that nickel induces 10-30 nm large triangular islands monolayer in height. In addition stripes are formed at the step edges via a step flow growth mode. The particular shape of the oriented triangular islands has been examined by STM and segregation of Cu atoms could be evidenced on top of the Ni islands after 0.5 ML deposition. It is shown that the Ni morphology and the Cu diffusion both have a strong influence on the magnetic properties. Correlations have be evidenced by performing in-situ Magnetic Circular X-ray Dichroism studies on Ni/Cu(111) ultra-thin films. The evolution of the island size during the growth can be correlated with the evolution of the orbital magnetic moment whereas strong dipolar magnetic moments are related to the formation of a second Cu/Ni interface. Moreover, the in-plane orbital magnetic moment anisotropy has been measured and related to magnetocrystalline effects in the film.