Journal Article

PreJuSER-11615

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Magnetic excitations in Dy/Y superlattices as seen via inelastic neutron scattering

Grünwald, A. T. D. ; Wildes, A. R. ; Schmidt, W.FZJ* ; Tartakovskaya, E. V. ; Kwo, J. ; Majkrzak, C. ; Ward, R. C. C. ; Schreyer, A.

2010
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10973  doi:10.1103/PhysRevB.82.014426

Abstract: Measurements of the spin excitations propagating normal to the interfaces in Dy/Y superlattices using neutron inelastic scattering are presented. For a given magnon momentum, a neutron-scattering spectrum shows multiple peaks at different energies, which indicates discrete energy spectra. The results are compared with theoretical calculations developed here to describe magnetic excitations in rare-earth superlattices. The theory accounts for Ruderman-Kittel-Kasuya-Yosida (RKKY) and Dzyaloshinsky-Moriya interactions in incommensurate helicoidal structures and achieves a quantitative agreement with the experimental data. This work demonstrates that neutron inelastic scattering can be used for systematic studies of the exchange interactions and spin dynamics in nanomagnetic systems over wide areas of the Brillouin zone.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Streumethoden (IFF-4)
2. Neutronenstreuung (IFF-5)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)
4. JCNS (Jülich Centre for Neutron Science JCNS (JCNS) ; JCNS)

Research Program(s):

1. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)
2. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)

Appears in the scientific report 2010

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