Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 5: Electron Theory of Magnetism

MA 5.5: Vortrag

Montag, 23. März 2009, 12:00–12:15, HSZ 103

Atom- and bond-resolved analysis of the magnetic anisotropy in multicomponent systems — •Sergej Subkow¹, Matej Komelj², and Manfred Fähnle¹ — ¹Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, 70569 Stuttgart, Germany — ²Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia

For the understanding of the magnetic anisotropy in multicomponent systems like compounds (e.g., FePt) or multilayer systems it would be helpful to subdivide the total anisotropy energy into contributions arising from various atoms or from various bonds between the atoms. The usefulness and the limitation of such type of analysis is assessed critically for four different approaches.

• a) procedures based on the magnetic force theorem [1]
• b) the relation of Bruno [2]
• c) the covalent bond energy [3]
• d) the method of switching off the spin-orbit coupling at various atoms [4].

[1] T. Burkert et al., Phys. Rev. B71, 134411 (2005).

[2] C.-G. Duan et al., Appl. Phys. Letters 92, 122905 (2008).

[3] G. Bester and M. Fähnle, Phys. Rev. B72, 212405 (2005).

[4] M. Komelj, D. Steiauf, and M. Fähnle, Phys. Rev. B73, 134428 (2006).