Interlayer coupling and magnetoresistance in Ir/Co multilayers
Institut für Physik, Universität Augsburg - D-86135 Augsburg,
Accepted: 14 April 1998
Fcc(111) oriented Ir/Co multilayers were prepared to study their magnetic and magnetotransport properties. The superlattice structure was characterized by X-ray diffraction. Results measured for magnetization and magnetoresistance () exhibit an oscillatory interlayer exchange coupling with a period of about nm (4.5 monolayers). The coupling strength JAF and the largest obtained are and 4% (at 10 K), respectively. The observed oscillatory behavior can be attributed to an interaction of separated Co magnetic layers, which must be some sort of RKKY coupling. Using this concept, we find a match of the measured oscillation period with the relevant wave vector on the Fermi surfaces of Ir.
PACS: 75.70.-i – Magnetic films and multilayers
© EDP Sciences, 1998