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Magnetic structure and anisotropy of Co/Pd (5)/NiFe multilayers

Journal article
Authors L. Tryputen
F. Guo
F. Liu
T. N. A. Nguyen
M. S. Mohseni
Sunjae Chung
Yeyu Fang
Johan Åkerman
R. D. McMichael
C. A. Ross
Published in Physical Review B
Volume 91
Issue 1
Pages artikel nr 014407
ISSN 1098-0121
Publication year 2015
Published at Department of Physics (GU)
Pages artikel nr 014407
Language en
Links dx.doi.org/10.1103/PhysRevB.91.0144...
Keywords SPIN-TORQUE OSCILLATOR, PERPENDICULAR-ANISOTROPY, REVERSAL, Physics, Condensed Matter
Subject categories Physical Sciences

Abstract

The magnetization behavior, magnetic anisotropy, and domain configurations of Co/Pd multilayers with perpendicular magnetic anisotropy capped with permalloy is investigated using magnetometry, magnetic force microscopy, and ferromagnetic resonance. The thickness of the Ni80Fe20 layer in [Co/Pd](5)/NiFe (t) was varied from t = 0 to 80 nm in order to study the interplay between the anisotropy and magnetization directions of Co/Pd and NiFe. By varying the thickness of the NiFe layer, the net anisotropy changes sign, but domains with plane- normal magnetization are present even for the thickest NiFe. Ferromagnetic resonance measurements show a decrease in damping with increasing NiFe thickness. The results demonstrate how the magnetic behavior of mixed- anisotropy thin films can be controlled.

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