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

Abstract

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.

References in corpus (1)

• Surface energies of stoichiometric FePt and CoPt alloys and their implications for nanoparticle morphologies

Cited by in corpus (4)

• Anomalous Hall effect in antiferromagnetic/non-magnetic interfaces
• Testing Predictions from Density Functional Theory at Finite Temperatures: ${\beta }_2$-Like Ground States in Co-Pt
• Giant perpendicular magnetic anisotropy energies in CoPt thin films: Impact of reduced dimensionality and imperfections
• Simulation of thermodynamic properties of magnetic transition metals from an efficient tight-binding model