Large effect of metal substrate on magnetic anisotropy of Co on hexagonal boron nitride

Abstract

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).

Magnetic Anisotropy in Divalent Lanthanide Compounds

“…Subsequently, we studied the deposition of the neutral DyO on the hexagonal boron nitride (h‐BN) surface. This substrate was recently used for the investigation of magnetization blocking of adsorbed Co ions . The geometry optimization was carried out with DFT for a fragment of h‐BN layer with saturated dangled bonds and deposited DyO unit.…”

Origin of the Large Perpendicular Magnetic Anisotropy in Nanometer-thick Epitaxial Graphene/Co/Heavy Metal Heterostructures

“…OMMs of isolated magnetic atoms on surfaces 39,40 , and has also been noted, for instance, in ultra-thin magnetic films 41 .…”

Magnetic Anisotropy in Divalent Lanthanide Complexes

“…This substrate was recently used for the investigation of magnetization blocking of adsorbed Co ions. 25 The geometry optimization was carried out with DFT, as described above, for a fragment of h-BN layer with saturated dangled bonds and deposited DyO unit. Fig.…”