https://doi.org/10.1140/epjb/e2005-00051-5
Exchange coupling of bilayers and synthetic antiferromagnets pinned to MnPt
1
INESC-MN, R. Alves Redol 9, 1000 Lisboa, Portugal
2
IFIMUP, Universidade do Porto, R. Campo Alegre, 4100 Porto, Portugal
3
Department of Physics and Astronomy, University of Glasgow,
University Avenue, Glasgow, UK
Corresponding author: a rickart@physik.uni-kl.de
Received:
29
September
2004
Revised:
8
January
2005
Published online:
8
March
2005
Exchange bias and blocking temperature were studied in MnPt based
bottom-pinned bilayers and synthetic antiferromagnets (SAF) prepared by
magnetron sputtering. The structure and magnetic properties were determined
as a function of the MnPt layer thickness. Exchange coupling was found to be
(
erg/cm
for a MnPt (
nm)/CoFe (5 nm)
bilayer. The distribution of the blocking temperature TB was analyzed
and its width 
and center point 
determined.
TB is about 280 
C for thinner MnPt films, and increases to 330 °C for thick films. 
is constant for thick MnPt but steadily
increases as the thickness decreases. SAF structures show higher exchange
bias and higher at thin layer thickness (
nm)
compared to bilayers.
PACS: 75.50.Ee – Antiferromagnetics / 75.70.Cn – Magnetic properties of interfaces (multilayers, superlattices, heterostructures) / 85.70.Kh – Magnetic thin film devices: magnetic heads; domain-motion devices, etc.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
