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Magnetic Phases of Cobalt Atomic Clusters on Tungsten
Journal of Physics: Condensed Matter (2013)
  • Pavel Lukashev, University of Northern Iowa
  • Ji-Hyun Kim, Sookmyung Womens University
  • Seolun Yang, Sookmyung Women's University
  • Jae- Sung Kim, Sookmyung Women's University
  • Xumin Chen, University of Nebraska–Lincoln
  • Geoffrey Rojas, University of Nebraska-Lincoln
  • Jan Honolka, Max Planck Institute for Solid State Physics
  • Ralph Skomski, University of Nebraska-Lincoln
  • Axel Enders, University of Nebraska-Lincoln
  • Renat F. Sabirianov, University of Nebraska at Omaha
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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Citation Information
Pavel Lukashev, Ji-Hyun Kim, Seolun Yang, Jae- Sung Kim, et al.. "Magnetic Phases of Cobalt Atomic Clusters on Tungsten" Journal of Physics: Condensed Matter Vol. 25 Iss. 3 (2013)
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