Spin magnetic moments from single atoms to small Cr clusters

• Published in: Physica Status Solidi (b) Vol. 242; no. 9; pp. 1775 - 1778
• Main Authors: Boeglin, C., Ohresser, P., Decker, R., Bulou, H., Scheurer, F., Chado, I., Dhesi, S. S., Gaudry, E., Lazarovits, B.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Berlin WILEY-VCH Verlag 01-07-2005; WILEY‐VCH Verlag; Wiley
• Subjects: 75.70.-i; 81.16.Dn; 81.16.Ta; Condensed Matter; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Diamagnetism, paramagnetism and superparamagnetism; Exact sciences and technology; Magnetic properties and materials; Magnetic properties of nanostructures; Materials Science; Metals and alloys; Methods of deposition of films and coatings; film growth and epitaxy; Physics; Theory and models of film growth; Low energy electron microscopy; Gold; Paramagnetism; Magnetic moments; X-ray spectra; Nanostructures; Thin films; Scanning tunneling microscopy; Temperature effects; Size effect; Chromium; Magnetic circular dichroism; Ferromagnetism; LEED; Microstructure; Island structure; Atomic clusters
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/pssb.200461714

Morphology studies at the first stages of the growth of Cr/Au(111) are reported and compared to the magnetic properties of the nanostructures. We analyze by Scanning Tunneling Microscopy and Low Energy Electron Diffraction the Cr clusters growth between 200 K and 300 K. In the early stages of the growth the morphology of the clusters shows monoatomic high islands located at the kinks of the herringbone reconstructed Au(111) surface. By X‐ray Magnetic Circular Dichroism performed on the Cr L2,3 edges it is shown that the temperature dependent morphology strongly influences the magnetic properties of the Cr clusters. We show that in the sub‐monolayer regime Cr clusters are antiferromagnetic and paramagnetic when the size reaches the atomic limit. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)