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Pré-Publication, Document De Travail Année : 2012

Magnetism: the Driving Force of Order in CoPt. A First-Principles Study

Résumé

CoPt or FePt equiatomic alloys order according to the tetragonal L10 structure which favors their strong magnetic anisotropy. Conversely magnetism can influence chemical ordering. We present here {\it ab initio} calculations of the stability of the L10 and L12 structures of Co-Pt alloys in their paramagnetic and ferromagnetic states. They show that magnetism strongly reinforces the ordering tendencies in this system. A simple tight-binding analysis allows us to account for this behavior in terms of some pertinent parameters.
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hal-00691274 , version 1 (25-04-2012)

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Sondes Karoui, Hakim Amara, Bernard Legrand, François Ducastelle. Magnetism: the Driving Force of Order in CoPt. A First-Principles Study. 2012. ⟨hal-00691274⟩
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