Neutron scattering measurements of magnetic excitations in Gd/Y superlattices

Neutron inelastic scattering has been used to measure the magnetic excitations as a function of applied magnetic field in an antiferromagnetically coupled Gd/Y superlattice. The excitations were measured along the c -axis, which is parallel to the normal of the interfaces and the sample growth direc...

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Bibliographic Details
Published in:Applied physics letters 2010-05, Vol.96 (19), p.192505-192505-3
Main Authors: Grünwald, A. T. D., Wildes, A. R., Schmidt, W., Tartakovskaya, E. V., Nowak, G., Theis-Bröhl, K., Schreyer, A.
Format: Article
Language:English
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Summary:Neutron inelastic scattering has been used to measure the magnetic excitations as a function of applied magnetic field in an antiferromagnetically coupled Gd/Y superlattice. The excitations were measured along the c -axis, which is parallel to the normal of the interfaces and the sample growth direction. Dispersive spin waves were unambiguously detected on the application of a magnetic field. The spin waves are shown to renormalize with field following a basic model drawn from standard spin wave theory. The model required no free parameters aside from an initial amplitude.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3428425