https://doi.org/10.1007/s100510050414
Well-defined Co clusters embedded in an Ag matrix: A model system for the giant magnetoresistance in granular films
II. Physikalisches Institut, Universität zu Köln,
Zülpicher Strasse 77, 50937 Köln, Germany
Corresponding author: a micklitz@colorix.ph2.uni-koeln.de
Received:
21
April
1998
Revised:
17
May
1998
Accepted:
18
May
1998
Published online: 15 September 1998
Well-defined granular Co/Ag films have been prepared by the
co-deposition of in-beam prepared Co clusters and Ag atoms. In this
way we were able to study the giant magnetoresistance (GMR) as a function
of mean Co cluster size 
for a fixed Co cluster volume
fraction vcl as well as a function of vcl for a fixed
. Mean Co cluster size has been varied between 
and
6.9 nm, Co cluster volume fraction between 5 and 43% . The GMR was measured
in-situ at T=4.2 K in magnetic fields 
1.2 T. The analysis
of the GMR data obtained from these studies
clearly shows that spin-dependent scattering at the
Co-cluster/Ag-matrix interface is the only relevant scattering mechanism
causing the GMR in our well-defined samples.
PACS: 72.15.Gd – Galvanomagnetic and other magnetotransport effects
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
