TY - JOUR
T1 - Large effect of metal substrate on magnetic anisotropy of Co on hexagonal boron nitride
AU - Gallardo, Iker
AU - Arnau, Andres
AU - Delgado, Fernando
AU - Baltic, Romana
AU - Singha, Aparajita
AU - Donati, Fabio
AU - Wäckerlin, Christian
AU - Dreiser, Jan
AU - Rusponi, Stefano
AU - Brune, Harald
N1 - Publisher Copyright:
© 2019 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
PY - 2019/7/29
Y1 - 2019/7/29
N2 - We combine x-ray absorption spectroscopy (XAS), x-ray magnetic circular dichroism (XMCD) and x-ray magnetic linear dichroism (XMLD) data with first principles density functional theory (DFT) calculations and a multiorbital many-body Hamiltonian approach to understand the electronic and magnetic properties of Co atoms adsorbed on h-BN/Ru(0001) and h-BN/Ir(111). The XAS line shape reveals, for both substrates, an electronic configuration close to 3d 8, corresponding to a spin S = 1. Magnetic field dependent XMCD data show large (14 meV) out-of-plane anisotropy on h-BN/Ru(0001), while it is almost isotropic (tens of μeV) on h-BN/Ir(111). XMLD data together with both DFT calculations and the results of the multiorbital Hubbard model suggest that the dissimilar magnetic anisotropy originates from different Co adsorption sites, namely atop N on h-BN/Ru(0001) and 6-fold hollow on h-BN/Ir(111).
AB - We combine x-ray absorption spectroscopy (XAS), x-ray magnetic circular dichroism (XMCD) and x-ray magnetic linear dichroism (XMLD) data with first principles density functional theory (DFT) calculations and a multiorbital many-body Hamiltonian approach to understand the electronic and magnetic properties of Co atoms adsorbed on h-BN/Ru(0001) and h-BN/Ir(111). The XAS line shape reveals, for both substrates, an electronic configuration close to 3d 8, corresponding to a spin S = 1. Magnetic field dependent XMCD data show large (14 meV) out-of-plane anisotropy on h-BN/Ru(0001), while it is almost isotropic (tens of μeV) on h-BN/Ir(111). XMLD data together with both DFT calculations and the results of the multiorbital Hubbard model suggest that the dissimilar magnetic anisotropy originates from different Co adsorption sites, namely atop N on h-BN/Ru(0001) and 6-fold hollow on h-BN/Ir(111).
KW - Density functional theory
KW - Magnetic anisotropic energy
KW - Multiplet calculations
KW - X-ray absorption
UR - http://www.scopus.com/inward/record.url?scp=85070937188&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/ab3077
DO - 10.1088/1367-2630/ab3077
M3 - Article
AN - SCOPUS:85070937188
SN - 1367-2630
VL - 21
JO - New Journal of Physics
JF - New Journal of Physics
IS - 7
M1 - 073053
ER -