Magnetic phases of cobalt atomic clusters on tungsten

Authors

• Pavel V. Lukashev, University of Nebraska–LincolnFollow
• Ji-Hyun Kim, Sookmyung Womens University, Seoul
• Seolum Yang, Sookmyung Womens University, Seoul
• Jae-Sung Kim, Sookmyung Womens University, Seoul
• Xumin Chen, University of Nebraska–Lincoln
• Geoffrey Rojas, University of Nebraska–LincolnFollow
• Jan Honolka, Max-Planck Institute for Solid State ResearchFollow
• Ralph Skomski, University of Nebraska-LincolnFollow
• Axel Enders, University of Nebraska–LincolnFollow
• Renat F. Sabirianov, University of Nebraska at OmahaFollow

Document Type

Article

Date of this Version

2013

Citation

Published in Journal of Physics: Condensed Matter 25:3 (2013), 036003 (4 pp.) doi: 10.1088/0953-8984/25/3/036003

Comments

Copyright © 2013 IOP Publishing Ltd. Used by permission.

Abstract

First-principle calculations are employed to show that the magnetic structure of small atomic clusters of Co, formed on a crystalline W(110) surface and containing 3–12 atoms, strongly deviates from the usual stable ferromagnetism of Co in other systems. The clusters are ferri-, ferro- or non-magnetic, depending on cluster size and geometry. We determine the atomic Co moments and their relative alignment, and show that antiferromagnetic spin alignment in the Co clusters is caused by hybridization with the tungsten substrate and band filling. This is in contrast with the typical strong ferromagnetism of bulk Co alloys, and ferromagnetic coupling in Fe/W(110) clusters.