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First principles calculations of the electronic structure of Fe1-xCoxPt

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5 Author(s)
Maclaren, J.M. ; Dept. of Phys., Tulane Univ., New Orleans, LA, USA ; Willoughby, S.D. ; McHenry, M.E. ; Ramalingam, B.
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The L10 alloys CoPt and FePt have strong uniaxial magneto-crystalline anisotropy as a consequence of the layering of Co or Fe and Pt planes. This makes these compounds of interest in permanent magnet applications. In this work we present the results of a study of the magnetic properties of the L10 alloys Fe1-xCo xPt for the range of compositions from FePt to CoPt. Local spin density calculations using the coherent potential approximation are used to follow trends in the magneto-crystalline anisotropy and magnetic moments across the composition range. Total energy calculations of ordered and disordered alloys are used to develop a pseudo-binary phase diagram of the Fe/Co layer predicting regions of phase separation in this layer at temperatures below 650°C

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Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 4 )