Volume 39, Number 3, July I 1997
|Page(s)||323 - 328|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Preserved interfacial magnetism and giant antiferromagnetic exchange coupling in Co/Rh sandwiches
IPCMS-GEMM, ULP-UMR 46 du CNRS - 23 rue du Loess,
67037 Strasbourg, France
2 Siemens AG, ZFE T MR 1 - P.O. Box 3220, D-91050 Erlangen, Germany
3 Department of Physics, University of York - Heslington, UK
Accepted: 30 June 1997
The interlayer coupling in Co/Rh/Co sandwiches prepared by UHV evaporation has been investigated by means of magnetization and transport experiments. We found that the antiferromagnetic coupling strength for thin Rh layers is the largest ever obtained in magnetic systems, reaching approximately for 5 Å thick Rh interlayer. This value is 7 to 8 times larger than the highest value previously observed in the Co/Ru system prepared under similar conditions. This unexpectedly large difference in the coupling strength between these two systems is mainly due to the magnetic nature of the interfaces. This is further supported by ab initio calculations of the magnetic moments in superlattices with mixed interfaces.
PACS: 75.30.Et – Exchange and superexchange interactions / 75.70.Cn – Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures)
© EDP Sciences, 1997
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