Anatomy of interfacial spin-orbit coupling in Co/Pd multilayers using X-ray magnetic circular dichroism and first-principles calculations

Jun Okabayashi; Yoshio Miura; Hiro Munekata

doi:10.1038/s41598-018-26195-w

Anatomy of interfacial spin-orbit coupling in Co/Pd multilayers using X-ray magnetic circular dichroism and first-principles calculations

Materials Science 2019-04-23 v1

Authors: Jun Okabayashi , Yoshio Miura , Hiro Munekata

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Abstract

Element-specific orbital magnetic moments and their anisotropies in perpendicularly magnetised Co/Pd multilayers are investigated using Co L-edge and Pd M-edge angle-dependent x-ray magnetic circular dichroism. We show that the orbital magnetic moments in Co are anisotropic, whereas those in Pd are isotropic. The first-principles density-functional-theory calculations also suggest that the Co/Pd interfacial orbital magnetic moments in Co are anisotropic and contribute to the perpendicular magnetic anisotropy (PMA), and that the isotropic ones in Pd manipulates the Co orbitals at the interface through proximity effects. Orbital-resolved anatomy of Co/Pd interfaces reveals that the orbital moment anisotropy in Co and spin-flipped transition related to the magnetic dipoles in Pd are essential for the appearance of PMA.

Keywords

co/pd multilayers spin-orbit coupling x-ray magnetic circular dichroism perpendicular magnetic anisotropy density functional theory orbital magnetic moment

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@article{arxiv.1805.02416,
  title  = {Anatomy of interfacial spin-orbit coupling in Co/Pd multilayers using X-ray magnetic circular dichroism and first-principles calculations},
  author = {Jun Okabayashi and Yoshio Miura and Hiro Munekata},
  journal= {arXiv preprint arXiv:1805.02416},
  year   = {2019}
}

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18 pages, 5 figures

Anatomy of interfacial spin-orbit coupling in Co/Pd multilayers using X-ray magnetic circular dichroism and first-principles calculations

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