Coupling mechanism in Co/Ru sandwiches with thin spacers

Coupling mechanism in Co/Ru sandwiches with thin spacers

A study of the indirect exchange coupling of Co/Ru sandwiches for small Ru spacer thicknesses has been performed. For critical thicknesses of the spacer, a large curvature of the M-H loops can be observed and its origin lies in a competition between areas with different couplings. These areas are sm...

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Veröffentlicht in:Journal of magnetism and magnetic materials 1996-04, Vol.156 (1-3), p.231-232
Hauptverfasser: Zoll, S., Van den Berg, H.A.M., Jay, J.P., Elmers, H.J., Meny, C., Panissod, P., Stoeffler, D., Dinia, A., Ounadjela, K.
Format: Artikel
Sprache:eng
Schlagworte:
Physics
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Zusammenfassung:A study of the indirect exchange coupling of Co/Ru sandwiches for small Ru spacer thicknesses has been performed. For critical thicknesses of the spacer, a large curvature of the M-H loops can be observed and its origin lies in a competition between areas with different couplings. These areas are smaller than the magnetic coherence length of the cobalt layers, and the existence of a large extrinsic biquadratic coupling is likely to occur. A strong interdiffusion at the interfaces seems to be determinant for the coupling mechanism.
ISSN:0304-8853
1873-4766
DOI:10.1016/0304-8853(95)00848-9