Magnetic properties of finite Co chains on Pt(111)

L. Szunyogh, B. Lazarovits, P. Weinberger, P. Weinberger

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present first-principles calculations of the magnetic moments and magnetic anisotropy energies of finite monoatomic (formula presented) (formula presented) chains deposited along the (110) direction on top of a fcc Pt(111) surface. The calculations were performed fully relativistically using the embedded-cluster technique within the Korringa-Kohn-Rostoker method. The magnetic anisotropy energy was evaluated by means of the magnetic force theorem. As a direct consequence of the reduced coordination number of the Co atoms, we found enhanced spin and orbital moments as well as enhanced anisotropy energies in the Co chains as compared to a Co overlayer on Pt(111). For the Pt atoms adjacent to the Co atoms, however, we obtained induced magnetic moments smaller than in the case of a Co monolayer on Pt(111). The moments and the contributions of the individual atoms to the magnetic anisotropy energy depend characteristically on the position within the chains, i.e., on the local environment of the individual atoms. Independent of the length of the chains we found that the easy axis is perpendicular to the surface. The size of the calculated magnetic anisotropy energy and of the anisotropy of the orbital moment fits very well to available experimental values for monoatomic Co chains deposited on a Pt(997) surface.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number2
DOIs
Publication statusPublished - Jan 1 2003

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Magnetic anisotropy
Magnetic properties
magnetic properties
Atoms
anisotropy
Magnetic moments
atoms
moments
Anisotropy
magnetic moments
energy
orbitals
Monolayers
coordination number
theorems

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Magnetic properties of finite Co chains on Pt(111). / Szunyogh, L.; Lazarovits, B.; Weinberger, P.; Weinberger, P.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 67, No. 2, 01.01.2003.

Research output: Contribution to journalArticle

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