Phys. Rev. B 60, 72 - 75 (1999)Exchange coupling in the paramagnetic state
J. W. Cai, Kai Liu, and C. L. Chien Received 2 February 1999 Exchange coupling has been observed in a ferromagnet (FM)/antiferromagnet (AF) bilayer with Curie temperature (TC)≪Néel temperature (TN) in the regime of T<TN, even when the FM layer is in the paramagnetic state. The exchange field HE and coercivity HC of the coupled bilayer show completely different temperature dependence from conventional FM/AF bilayers with TC>TN. 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
URL: http://link.aps.org/doi/10.1103/PhysRevB.60.72 [ Abstract | Previous article | Next article | Issue 1 ] |
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