Coulomb Correlations and Magnetic Anisotropy in ordered $L1_0$ CoPt and FePt alloys

Details Coulomb Correlations and Magnetic Anisotropy in ordered $L1_0$ CoPt and FePt alloys Coulomb Correlations and Magnetic Anisotropy in ordered $L1_0$ CoPt and FePt alloys

2002-10-08

arxiv.org/abs/cond-mat/0210157v2

Physics

Condensed Matter

Materials Science

revised version; 4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.67.172407

We present results of the magneto-crystalline anisotropy energy (MAE) calculations for chemically ordered $L1_0$ CoPt and FePt alloys taking into account the effects of strong electronic correlations and spin-orbit coupling. The local spin density + Hubbard U approximation (LSDA+U) is shown to provide a consistent picture of the magnetic ground state properties when intra-atomic Coulomb correlations are included for both 3$d$ and 5$d$ elements. Our results demonstrate significant and complex contribution of correlation effects to large MAE of these material.

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