T. Ambrose et al., STUDIES OF DEPOSITION ORDER ANOMALY OF EXCHANGE COUPLING IN BILAYERS AND TRILAYERS OF NIFE AND COO, Journal of applied physics, 81(8), 1997, pp. 5007-5009
The temperature dependence of the exchange field and coercivity and th
e effect of deposition order have been studied in a series of bilayer
(NiFe/CoO and CoO/NiFe) and trilayer (NiFe/CoO/NiFe) films. A profound
difference in the exchange field temperature behavior was observed in
samples with NiFe deposited on top of CoO compared to samples with Co
O deposited on top of NiFe. When CoO is on top of NiFe, the exchange f
ield follows a linear temperature dependence, while for samples with N
iFe on top of CoO, the exchange field has a plateau followed by a rapi
d decrease. These distinct temperature dependences are reproduced in t
he NiFe/CoO/NiFe trilayer which contains both geometries. Transmission
electron microscopy has been employed to study the interface between
the NiFe and CoO layers. (C) 1997 American Institute of Physics.