John G. Long, Peter C. Searson, et al.
JES
The out-of-plane orbital magnetic moment of Co in Co/X multilayers (X=Pd, Pt, and Ni) with perpendicular magnetic anisotropy has been investigated using x-ray magnetic-circular-dichroism spectroscopy. The orbital d moment per Co atom, morb, is considerably enhanced by (0.15±0.02)μB and (0.07±0.02)μB in Co/Pd and Co/Pt multilayers, respectively, compared with a single thick Co film. No respective enhancement is found in the case of Co/Ni. This enhancement does not scale with the spin-orbit coupling parameter ξSO of Ni-3d, Pd-4d, and Pt-5d bands despite strong d-d mixing which leads to the presence of ferromagnetic moments of Pd and Pt atoms. However, a roughly linear scaling relation of the out-of-plane orbital moment morb with the intrinsic uniaxial anisotropy constant Ku,1Co per Co volume is observed. This experimental finding is interpreted in conjunction with recent ab initio and tight-binding band-structure calculations as evidence for a preferential enhancement of the out-of-plane orbital moment of Co in Co/Pd and Co/Pt multilayers. © 1994 The American Physical Society.
John G. Long, Peter C. Searson, et al.
JES
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
Daniel J. Coady, Amanda C. Engler, et al.
ACS Macro Letters
A. Gupta, R. Gross, et al.
SPIE Advances in Semiconductors and Superconductors 1990