Short Period Magnetic Coupling Oscillations in Co/Si Multilayers: Theory versus Experiment

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Nader Yaacoub, Christian Meny, Olivier Bengone, and Pierre Panissod
Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 ULP-CNRS, 23 rue du Lss, BP 43, 67034 Strasbourg cedex 2, France

Received 18 May 2006; published 22 December 2006

Todaythe magnetic properties of multilayers and nanostructures including a metalor an insulator as a nonmagnetic spacer layer are ratherwell understood. But they are much more controversial for semiconductorspacers. For instance, for Co/Si multilayers short period coupling oscillationsare predicted by ab initio computations but have yet to beobserved. Here we show in Co/Si multilayers prepared at lowtemperature (90 K) strong saturation field oscillations that are consistent withthe predicted coupling oscillations. However, the decay length of theoscillations is much longer than the expected one and cannotbe explained within the framework of available theories.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.97.257206
DOI:	10.1103/PhysRevLett.97.257206
PACS:	75.70.Cn; 68.35.Ct; 75.40.Mg 75.70.Cn Magnetic properties of interfaces (multilayers, superlattices, heterostructures) 68.35.Ct Solid-solid interface structure and roughness 75.40.Mg Numerical simulation studies of magnetic materials YEAR: 2006

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