Neutron scattering measurements of magnetic excitations in Gd/Y superlattices

Grünwald, A. T. D.; Schreyer, A.; Schmidt, W.; Wildes, A. R.; Tartakovskaya, E. V.; Nowak, G.; Theis-Bröhl, K.

doi:10.1063/1.3428425

Journal Article

Neutron scattering measurements of magnetic excitations in Gd/Y superlattices

Grünwald, A. T. D. ; Wildes, A. R. ; Schmidt, W.FZJ* ; Tartakovskaya, E. V. ; Nowak, G. ; Theis-Bröhl, K. ; Schreyer, A.

2010
American Institute of Physics Melville, NY

Applied physics letters 96, 192505 (2010) [10.1063/1.3428425]

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Please use a persistent id in citations: http://hdl.handle.net/2128/17383 doi:10.1063/1.3428425

Abstract: 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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3428425]

Keyword(s): J ; antiferromagnetic materials (auto) ; gadolinium (auto) ; magnetic multilayers (auto) ; neutron diffraction (auto) ; renormalisation (auto) ; spin waves (auto) ; yttrium (auto)