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In this work, IrMn$_{3}$/insulating-Y$_{3}$Fe$_{5}$O$_{12}$ exchange-biasedbilayers are studied. The behavior of the net magnetic moment $\Delta m_{AFM}$in the antiferromagnet is directly probed by anomalous and planar Hall effects,and anisotropic magnetoresistance. The $\Delta m_{AFM}$ is proved to come fromthe interfacial uncompensated magnetic moment. We demonstrate that the exchangebias and rotational hysteresis are induced by the irreversible switching of the$\Delta m_{AFM}$. In the training effect, the $\Delta m_{AFM}$ changescontinuously. This work highlights the fundamental role of the $\Delta m_{AFM}$in the exchange bias and facilitates the manipulation of antiferromagneticspintronic devices.

Galvanomagnetic effects and manipulation of antiferromagnetic interfacial uncompensated magnetic moment in exchange-biased bilayers