STUDIES OF DEPOSITION ORDER ANOMALY OF EXCHANGE COUPLING IN BILAYERS AND TRILAYERS OF NIFE AND COO

Citation
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
Citations number
16
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00218979
Volume
81
Issue
8
Year of publication
1997
Part
2B
Pages
5007 - 5009
Database
ISI
SICI code
0021-8979(1997)81:8<5007:SODOAO>2.0.ZU;2-O
Abstract
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.