Atomistic spin model based on a spin-cluster expansion technique: Application to the IrMn3/Co interface

L. Szunyogh, L. Udvardi, J. Jackson, U. Nowak, R. Chantrell

Research output: Contribution to journalArticle

38 Citations (Scopus)


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.

Original languageEnglish
Article number024401
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
Publication statusPublished - Jan 4 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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