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

35 Citations (Scopus)

Abstract

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
Volume83
Issue number2
DOIs
Publication statusPublished - Jan 4 2011

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Magnetic anisotropy
Exchange interactions
expansion
anisotropy
Anisotropy
interactions
broken symmetry
prototypes
moments

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Atomistic spin model based on a spin-cluster expansion technique : Application to the IrMn3/Co interface. / Szunyogh, L.; Udvardi, L.; Jackson, J.; Nowak, U.; Chantrell, R.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 83, No. 2, 024401, 04.01.2011.

Research output: Contribution to journalArticle

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