https://doi.org/10.1007/s100510050025
Tunneling magnetoresistance in granular films made of well-defined Co clusters embedded in an inert-gas matrix
II. Physikalisches Institut, Universität zu Köln,
Zülpicher Strasse 77, 50937 Köln, Germany
Received:
19
July
1999
Published online: 15 January 2000
We present a new tunneling magnetoresistance (TMR) system.
Granular films consisting of well-defined ferromagnetic Co
clusters embedded in insulating inert-gas matrices Kr and Xe have
been prepared by the co-deposition of in-beam prefabricated Co
clusters and inert-gas atoms. Experiments show that the resistance
of these films clearly follows an 
-law and
reveal a tunneling magnetoresistance (TMR) of about 7% at 10 K.
The TMR is found to be only weakly temperature dependent and
independent of the tunneling barrier.
PACS: 72.15.Gd – Galvanomagnetic and other magnetotransport effects / 73.40.Gk – Tunneling / 73.40.Rw – Metal-insulator-metal structures / 61.46.+w – Clusters, nanoparticles, and nanocrystalline materials
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
