Effect of oxygen on the Mn-Co ferromagnetic coupling
Identifieur interne : 000219 ( France/Analysis ); précédent : 000218; suivant : 000220Effect of oxygen on the Mn-Co ferromagnetic coupling
Auteurs : Stepan Pick [République tchèque] ; Claude Demangeat [France]Source :
- Catalysis today [ 0920-5861 ] ; 2004.
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Abstract
The paper describes the study of the effect of oxidation on the magnetic coupling between Mn and Co atoms in ultrathin Mn films deposited on fcc Co(0 0 1). The magnetic map has been investigated through tight-binding linear-muffin-tin scheme within generalized gradient approximation of the density functional. The calculations indicate that oxygen tends to destabilize the ferromagnetic Mn-Co coupling in favour of an antiferromagnetic coupling found by experiment when oxygen is added. Nevertheless, the (1 x 1) structures observed do not seem to be the most stable ones. We speculate that a disordered oxidized Mn-rich MnCo surface alloy might explain the experimental findings.
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Pascal:04-0237128Le document en format XML
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The magnetic map has been investigated through tight-binding linear-muffin-tin scheme within generalized gradient approximation of the density functional. The calculations indicate that oxygen tends to destabilize the ferromagnetic Mn-Co coupling in favour of an antiferromagnetic coupling found by experiment when oxygen is added. Nevertheless, the (1 x 1) structures observed do not seem to be the most stable ones. We speculate that a disordered oxidized Mn-rich MnCo surface alloy might explain the experimental findings.</div></front></TEI><affiliations><list><country><li>France</li><li>République tchèque</li></country><region><li>Alsace (région administrative)</li><li>Grand Est</li></region><settlement><li>Strasbourg</li></settlement></list><tree><country name="République tchèque"><noRegion><name sortKey="Pick, Stepan" sort="Pick, Stepan" uniqKey="Pick S" first="Stepan" last="Pick">Stepan Pick</name></noRegion></country><country name="France"><region name="Grand Est"><name sortKey="Demangeat, Claude" sort="Demangeat, Claude" uniqKey="Demangeat C" first="Claude" last="Demangeat">Claude Demangeat</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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