摘要：In this work, disordered-IrMn3/insulating-Y3Fe5O12 exchange-biased bilayers are studied. The behavior of the net magnetic moment Δ mAFM in the antiferromagnet is directly probed by anomalous and planar Hall effects, and anisotropic magnetoresistance. The Δ mAFM is proved to come from the interfacial uncompensated magnetic moment. We demonstrate that the exchange bias and rotational hysteresis loss are induced by partial rotation and irreversible switching of the Δ mAFM . In the athermal training effect, the state of the Δ mAFM cannot be recovered after one cycle of hysteresis loop. This work highlights the fundamental role of the Δ mAFM in the exchange bias and facilitates the manipulation of antiferromagnetic spintronic devices.
