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We show how compensated antiferromagnetic interfaces can be implemented in the micromagnetic simulation program MuMax3. We demonstrate that we can model spin flop coupling as a uniaxial anisotropy for small canting angles and how we can take into account the exact energy terms for strong coupling between a ferromagnet and a compensated antiferromagnet. We also investigate athermal training in biaxial antiferromagnets and reproduce the training effect in a polycrystalline IrMn/CoFe bilayer. [ABSTRACT FROM AUTHOR]

The unidirectional shift of the hysteresis loop and the athermal training effect are two key features of the exchange bias phenomenon in most polycrystalline FM/AFM bilayers. We show that, by using MuMax3 which is an open source micromagnetic simulation program, we are able to reproduce experimental data (bias field and coercivity) for a polycrystalline Co/CoO bilayer. We also demonstrate that rotatable uncompensated spins can be responsible for the athermal training effect and that the reversal mechanism between the ascending and descending branch in the first hysteresis loop can be different, as has frequently been noticed in experiments. [ABSTRACT FROM AUTHOR]