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                    Phys. Rev. Lett. 78, 134–137 (1997)

                        [Issue 1 – 6 January 1997 ]

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Periodic Enhancement of the Electron-Electron Interactions and the
Magnetoresistance in Magnetic Co/(Cr/Ag)/Co Multilayers

     F. G. Aliev, E. Kunnen, K. Temst, K. Mae, G. Verbanck, J. Barnas, V.
     V. Moshchalkov, and Y. Bruynseraede
     Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke
     Universiteit Leuven, Celestijnenlaan 200D, Leuven B 3001, Belgium

Received 9 July 1996

Electrical transport and magneto-optical Kerr effect have been measured on
Co/(Cr/Ag)/Co multilayers in which the thickness lambda of the bimetallic
nonmagnetic spacer Cr/Ag varies from 0 to 35 Å. The measurements clearly
indicate the presence of antiferromagnetic coupling for 9< lambda <23 Å. At
low temperatures (T<20 K), the resistivity shows a logarithmic increase
which is most probably caused by the two-dimensional electron-electron
interactions. The magnitude of the log 10T term and of the negative
magnetoresistance varies periodically with a period corresponding
approximately to one monolayer of Cr.

©1997 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v78/p134
DOI: 10.1103/PhysRevLett.78.134
PACS: 75.70.Cn, 73.50.Jt, 73.50.Yg, 78.66.Bz
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