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

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2011
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Szunyogh, Laszlo
Udvardi, László
Jackson, Jerome
Chantrell, Roy W.
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Physical review B. 2011, 83(2), 024401. Available under: doi: 10.1103/PhysRevB.83.024401
Zusammenfassung

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.

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530 Physik
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atomistic spin model, spin-cluster
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ISO 690SZUNYOGH, Laszlo, László UDVARDI, Jerome JACKSON, Ulrich NOWAK, Roy W. CHANTRELL, 2011. Atomistic spin model based on a spin-cluster expansion technique: Application to the IrMn3/Co interface. In: Physical review B. 2011, 83(2), 024401. Available under: doi: 10.1103/PhysRevB.83.024401
BibTex
@article{Szunyogh2011Atomi-5012,
  year={2011},
  doi={10.1103/PhysRevB.83.024401},
  title={Atomistic spin model based on a spin-cluster expansion technique: Application to the IrMn3/Co interface},
  number={2},
  volume={83},
  journal={Physical review B},
  author={Szunyogh, Laszlo and Udvardi, László and Jackson, Jerome and Nowak, Ulrich and Chantrell, Roy W.},
  note={Article Number: 024401}
}
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