Abstract
We propose a generic formalism to estimate the anisotropies, exchange energies, and the surface antiferromagnet (AFM) moment of AFM-ferromagnet (FM) heterostructure systems that show spin glass like behavior. This scheme provides quantitative agreement with multiple experiments on epitaxial bismuth ferrite (BFO)-FM system that have been reported recently. We find that a single value of the interface coupling energy can reproduce both the exchange bias and the coercivity enhancement observed in experiments. We also find a surprisingly high surface AFM moment density that agrees well with measured values. This high moment on the BFO surface is indicative of a significant modulation of magnetic properties at the BFO-FM interface.
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