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Magnetic coupling in asymmetric FeCoV/Ru/FeNi trilayers

Conference paper
Authors Y. J. Wei
S. Jana
R. Brucas
Yevgen Pogoryelov
Mojtaba Ranjbar
Randy K. Dumas
P. Warnicke
Johan Åkerman
D. A. Arena
O. Karis
P. Svedlindh
Published in Journal of Applied Physics
ISSN 0021-8979
Publication year 2014
Published at Department of Physics (GU)
Language en
Links dx.doi.org/10.1063/1.4864743
Keywords BRILLOUIN LIGHT-SCATTERING, Physics, Applied, PHYSICS, APPLIED
Subject categories Physical Sciences

Abstract

We have investigated the magnetic anisotropy and interlayer coupling in trilayer films of permendur(100 angstrom)/Ru/permalloy(100 angstrom), with the thickness of the Ru spacer varying from 0 to 200 angstrom. While the permendur/permalloy sample exhibits a small in-plane uniaxial magnetic anisotropy with H-u = 27 Oe, all trilayers are magnetically isotropic in-plane. Results from hysteresis loop and ferromagnetic resonance measurements were fitted to a micromagnetic model, with the results indicating that all the films are ferromagnetically coupled except the one with 10 angstrom Ru spacer, which shows antiferromagnetic coupling. The trilayers with Ru spacer layer thickness larger than 20 angstrom exhibit only very weak ferromagnetic coupling. (C) 2014 AIP Publishing LLC.

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