Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-10-12
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 6 figures
Scientific paper
In order to derive tensorial exchange interactions and local magnetic anisotropies in itinerant magnetic systems, an approach combining the Spin-Cluster Expansion with the Relativistic Disordered Local Moment scheme is introduced. The theoretical background and computational aspects of the method are described in detail. The exchange interactions and site resolved anisotropy contributions for the IrMn3/Co(111) interface, a prototype for an exchange bias system, are calculated including a large number of magnetic sites from both the antiferromagnet and ferromagnet. Our calculations reveal that the coupling between the two subsystems is fairly limited to the vicinity of the interface. The magnetic anisotropy of the interface system is discussed, including effects of the Dzyaloshinskii-Moriya interactions that appear due to symmetry breaking at the interface.
Chantrell R.
Jackson Jacque
Nowak Ulrich
Szunyogh László
Udvardi L.
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