Friday, December 21, 2012

1212.4859 (C. Ward et al.)

Realizing a High Magnetic Moment in Gd/Cr/FeCo: The Role of the Rare

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