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

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.