Realizing a high magnetic moment in Gd/Cr/FeCo: The role of the rare earth

C. Ward; G. Scheunert; W. R. Hendren; R. Hardeman; M. A. Gubbins; R. M. Bowman

doi:10.1063/1.4794820

Realizing a high magnetic moment in Gd/Cr/FeCo: The role of the rare earth

C. Ward, G. Scheunert, W. R. Hendren, R. Hardeman, M. A. Gubbins, R. M. Bowman

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Abstract

The search for materials or systems exhibiting a high magnetic saturation has been of longstanding importance. It has been suggested that increased saturation could be achieved by coupling a transition metal via a spacer to a rare earth. We report Gd/Cr/Fe₇₀Co₃₀ multilayer stacks and find reduced yet modulating magnetic moment as a function of Cr thickness. Through a micro structural analysis the lowered moment is indicated by the nucleation of the ultrathin Gd films into an fcc phase. We discuss the possible solution in terms of quasi-perfect lattice match seed material to promote growth of hcp Gd.

Original language	English
Article number	092403
Number of pages	4
Journal	Applied Physics Letters
Volume	102
Issue number	9
DOIs	https://doi.org/10.1063/1.4794820
Publication status	Published - 04 Mar 2013

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10.1063/1.4794820

Realizing a high magnetic moment in Gd/Cr/FeCo: The role of the rare earth
Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
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R5692CMM: The STX QUB INI Project
Bowman, R., Atkinson, R., Dawson, P., Gregg, M., Pollard, R. & Zayats, A.
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AU - Gubbins, M. A.

AU - Bowman, R. M.

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AB - The search for materials or systems exhibiting a high magnetic saturation has been of longstanding importance. It has been suggested that increased saturation could be achieved by coupling a transition metal via a spacer to a rare earth. We report Gd/Cr/Fe70Co30 multilayer stacks and find reduced yet modulating magnetic moment as a function of Cr thickness. Through a micro structural analysis the lowered moment is indicated by the nucleation of the ultrathin Gd films into an fcc phase. We discuss the possible solution in terms of quasi-perfect lattice match seed material to promote growth of hcp Gd.

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Realizing a high magnetic moment in Gd/Cr/FeCo: The role of the rare earth

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