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Spin wave excitations in exchange-coupled Co/Pd -NiFe films with tunable tilting of the magnetization

Journal article
Authors S. Tacchi
T. N. A. Nguyen
G. Carlotti
G. Gubbiotti
M. Madami
Randy K. Dumas
J. W. Lau
Johan Åkerman
A. Rettori
M. G. Pini
Published in Physical Review B
Volume 87
Issue 14
Pages artikel nr 144426
ISSN 1098-0121
Publication year 2013
Published at Department of Physics (GU)
Pages artikel nr 144426
Language en
Links dx.doi.org/10.1103/PhysRevB.87.1444...
Keywords field, multilayer, torque, scattering, surface
Subject categories Physical Sciences

Abstract

Brillouin light scattering was applied to measure the evolution of spin waves in exchange-coupled [Co/Pd]-NiFe films with out-of-plane/in-plane magnetic anisotropy. Tunable tilting of the magnetization has important effects on the spin wave frequency gap: a substantial increase is observed with decreasing the soft NiFe thickness, while seemingly insignificant tilting angles cause a strong reduction with respect to a film with only the hard [Co/Pd] component. The spin wave frequency is reproduced also in samples, with increased thickness of the upper Pd layer, where a sudden modification in the tilting at the hard/soft interface is caused by the weakening of interlayer exchange.

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