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Magnetic phases of cobalt atomic clusters on tungsten

Authors
Lukashev, Pavel V.Kim, Ji-HyunYang, SeolunKim, Jae-SungChen, XuminRojas, GeoffreyHonolka, JanSkomski, RalphEnders, AxelSabirianov, Renat F.
Issue Date
Jan-2013
Publisher
IOP PUBLISHING LTD
Citation
JOURNAL OF PHYSICS-CONDENSED MATTER, v.25, no.3, pp.1 - 4
Journal Title
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume
25
Number
3
Start Page
1
End Page
4
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/11369
DOI
10.1088/0953-8984/25/3/036003
ISSN
0953-8984
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.
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