Exchange Bias driven by Dzyaloshinskii-Moriya interactions
arXiv:1305.2308 · doi:10.1103/PhysRevLett.111.217202
Abstract
The exchange bias effect in compensated IrMn3/Co(111) system is studied using multiscale modeling from "ab initio" to atomistic calculations. We evaluate numerically the out-of-plane hysteresis loops of the bi-layer for different thickness of the ferromagnetic layer. The results show the existence of a perpendicular exchange bias field and an enhancement of the coercivity of the system. In order to elucidate the possible origin of the exchange bias, we analyze the hysteresis loops of a selected bi-layer by tuning the different contributions to the exchange interactions across the interface. Our results indicate that the exchange bias is primarily induced by the Dzyaloshinskii-Moriya interactions, while the coercivity is increased mainly due to a spin-flop mechanism.
References in corpus (3)
- Exchange bias driven by the Dzyaloshinskii-Moriya interaction and ferroelectric polarization at G-type antiferromagnetic perovskite interfaces
- Giant magnetic anisotropy of the bulk antiferromagnets IrMn and IrMn3
- Atomistic spin-model based on a new spin-cluster expansion technique: Application to the IrMn3/Co interface
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