Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 68: Electronic Structure Theory: Many-Body Effects

O 68.2: Poster

Mittwoch, 18. März 2015, 18:15–21:00, Poster A

The role of the quantum well states in the oscillating behavior of the magnetic anisotropy energy and the orbital moment anisotropy — •Leonid Sandratskii — Max Planck Institute of Microstructure Physics, Halle, Germany

We report detailed first-principles theoretical study of the correlated behavior of the magnetic anisotropy energy and the orbital moment anisotropy as a function of the thickness of the ferromagnetic films. The role of the quantum well states in the formation of the oscillations is discussed. The analysis of the contributions of different points in the 2D Brillouin zone is performed. The special role of the surface layer is considered. The symmetry of the quantum mechanical problem is studied. It is shown that the electronic states possess transversal components of the orbital moment that compensate each other after summation over the Brillouin zone.