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Updated: May 6, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Magnetic anisotropy of FeO and CoO: the influence of gradient corrections on exchange and correlation
Andreas Schrön1, Friedhelm Bechstedt
1Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität, Max-Wien-Platz 1, D-07743 Jena, Germany. European Theoretical Spectroscopy Facility (ETSF).
Abstract:
We study the formation of local magnetic moments and the magnetic anisotropy of the antiferromagnetic transition-metal compounds FeO and CoO in the framework of the density functional theory. Exchange and correlation are described within two (semi-)local approximations, the local spin-density approximation (LDA) and the generalized gradient approximation (GGA), in order to investigate the role of gradient corrections. An additional on-site Coulomb interaction U is considered in an LDA+U/GGA+U approach and spin-orbit interaction is taken into account. We find that the orbital magnetization is strongly quenched in the GGA+U approach compared to LDA+U results and experimental findings. The quenching is explained in terms of an overestimated exchange enhancement for the partially filled 3d shells due to the gradient corrections inherent in GGA+U.
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