Epitaxial stabilization of ferromagnetism in the nanophase of FeGe.
Phys Rev Lett
; 96(12): 127201, 2006 Mar 31.
Article
em En
| MEDLINE
| ID: mdl-16605951
ABSTRACT
Epitaxial nanocrystals of FeGe have been stabilized on Ge(111). The nanocrystals assume a quasi-one-dimensional shape as they grow exclusively along the <110> direction of the Ge(111) substrate, culminating in a compressed monoclinic modification of FeGe. Whereas monoclinic FeGe is antiferromagnetic in the bulk, the nanowires are surprisingly strong ferromagnets below approximately 200 K with an average magnetic moment of 0.8 microB per Fe atom. Density functional calculations indicate an unusual stabilization mechanism for the observed ferromagnetism lattice compression destabilizes the antiferromagnetic Peierls-like ground state observed in the bulk while increased p-d hybridization suppresses the magnetic moments and stabilizes ferromagnetism.
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MEDLINE
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article