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WFe_2.pdf (1.12 MB)

Effect of H Adsorption on the Magnetic Properties of an Fe Island on a W(110) Surface

preprint
submitted on 22.08.2019, 10:31 and posted on 23.08.2019, 15:03 by Marko Melander, Hannes Jonsson

Low-dimensional materials, such as ultrathin films, nanoislands and wires, are actively being researched due to their interesting magnetic properties and possible technological applications for example in high density data storage. Results of calculations of an Fe nanoisland on a W(110) support are presented here with particular focus on the effect of hydrogen adsorption on its magnetic properties. This is an important consideration since hydrogen is present even under ultra-high vacuum conditions. The calculations are based on density functional theory within the generalized gradient approximation. The adsorption of H atoms is found to strongly decrease the magnetic moment of the Fe atoms they are bound to, down to less than a half in some cases as compared with the clean Fe island. The results show that it may be important to take the presence of hydrogen into account in measurements of magnetic properties of nanoislands.

Funding

Academy of Finland (Project No. 307853)

History

Email Address of Submitting Author

marko.m.melander@jyu.fi

Institution

Department of Chemistry, University of Jyväskylä

Country

Finland

ORCID For Submitting Author

0000-0001-7111-1603

Declaration of Conflict of Interest

None

Version Notes

First version

Exports