Exchange Bias Driven by Dzyaloshinskii-Moriya Interactions

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2013
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Jackson, J.
Udvardi, László
Szunyogh, László
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FEMTOSPIN - Multiscale Modelling of Femtosecond Spin Dynamics
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Physical Review Letters. 2013, 111(21). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.111.217202
Zusammenfassung

The exchange bias effect in a compensated IrMn3/Co(111) system is studied using multiscale modeling from ab initio to atomistic spin model calculations. We evaluate numerically the out-of-plane hysteresis loops of the bilayer for different thicknesses of the ferromagnetic layer. The results show the existence of a perpendicular exchange bias and an enhancement of the coercivity of the system. To identify the origin of the exchange bias, we analyze the hysteresis loops of a selected bilayer by tuning the different contributions to the exchange interaction across the interface. Our results indicate that the exchange bias is primarily induced by Dzyaloshinskii-Moriya interactions, while the coercivity is increased mainly due to a spin-flop mechanism.

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530 Physik
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exchange, bias, Dzyaloshinskii-Moriya, interactions
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ISO 690YANES DÍAZ, Rocio, J. JACKSON, László UDVARDI, László SZUNYOGH, Ulrich NOWAK, 2013. Exchange Bias Driven by Dzyaloshinskii-Moriya Interactions. In: Physical Review Letters. 2013, 111(21). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.111.217202
BibTex
@article{YanesDiaz2013Excha-26771,
  year={2013},
  doi={10.1103/PhysRevLett.111.217202},
  title={Exchange Bias Driven by Dzyaloshinskii-Moriya Interactions},
  number={21},
  volume={111},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Yanes Díaz, Rocio and Jackson, J. and Udvardi, László and Szunyogh, László and Nowak, Ulrich}
}
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