Finite-size effects: hydrogen in Fe/V(001) superlattices

Finite-size effects: hydrogen in Fe/V(001) superlattices

We investigate the effect of finite size on phase boundaries of hydride formation in ultrathin metallic films, using Fe/V(001) superlattices as a model system. The critical temperature is determined to scale linearly with the inverse thickness of the V layers. The decrease of the ordering temperatur...

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Veröffentlicht in:Physical review letters 2014-07, Vol.113 (4), p.046103-046103, Article 046103
Hauptverfasser: Xin, Xiao, Pálsson, Gunnar K, Wolff, Max, Hjörvarsson, Björgvin
Format: Artikel
Sprache:eng
Schlagworte:
Hydrides
Ice crystals
Inverse
Iron
Mathematical analysis
Nanostructure
Phase boundaries
Superlattices
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Zusammenfassung:We investigate the effect of finite size on phase boundaries of hydride formation in ultrathin metallic films, using Fe/V(001) superlattices as a model system. The critical temperature is determined to scale linearly with the inverse thickness of the V layers. The decrease of the ordering temperature with decreasing layer thickness arises from the missing H neighbors at the interfaces, analogous to observed finite-size effects in magnetic layers and nanosized ice crystals.
ISSN:0031-9007
1079-7114
1079-7114
DOI:10.1103/PhysRevLett.113.046103