Exchange coupling has been observed in a ferromagnet (FM)/antiferromagnet (AF) bilayer with Curie temperature (TC)≪Néel temperature (TN) in the regime of TTN. With increasing temperature, HC vanishes at TC, whereas HE persists to TN. The results show that the exchange coupling can be established in FM/AF bilayers regardless of the relative values of TC and TN. © 1999 The American Physical Society.