Large effect of metal substrate on magnetic anisotropy of Co on hexagonal boron nitride
- 주제(키워드) magnetic anisotropic energy , x-ray absorption , density functional theory , multiplet calculations
- 주제(기타) Physics, Multidisciplinary
- 등재 SCIE, SCOPUS
- OA유형 Green Published, Green Submitted, gold
- 발행기관 IOP PUBLISHING LTD
- 발행년도 2019
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000161256
- 본문언어 영어
- Published As http://dx.doi.org/10.1088/1367-2630/ab3077
초록/요약
We combine x-ray absorption spectroscopy (XAS), x-raymagnetic circular dichroism (XMCD) and x-ray magnetic linear dichroism (XMLD) data with first principles density functional theory (DFT) calculations and amultiorbital 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 mu eV) 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 Non h-BN/Ru(0001) and 6-fold hollow on h-BN/Ir(111).
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