@article{3260405b53574cdc82f63c35c3f3a3a1,
title = "Spin Excitations in a 4f-3d Heterodimer on MgO",
abstract = "We report on the magnetic properties of HoCo dimers as a model system for the smallest intermetallic compound of a lanthanide and a transition metal atom. The dimers are adsorbed on ultrathin MgO(100) films grown on Ag(100). New for 4f elements, we detect inelastic excitations with scanning tunneling spectroscopy and prove their magnetic origin by applying an external magnetic field. In combination with density functional theory and spin Hamiltonian analysis, we determine the magnetic level distribution, as well as sign and magnitude of the exchange interaction between the two atoms. In contrast to typical 4f-3d bulk compounds, we find ferromagnetic coupling in the dimer.",
author = "A. Singha and F. Donati and Natterer, {F. D.} and C. W{\"a}ckerlin and S. Stavri{\'c} and Popovi{\'c}, {Z. S.} and {\v S}ljivan{\v c}anin, {A. Z.} and F. Patthey and H. Brune",
note = "Funding Information: We acknowledge funding from the Swiss National Science Foundation (SNSF) through Grants No. 200020–No. 157081 (A. S.), No. PP00P2_176866 and No. PZ00P2_167965 (F. D. N.), No. PZ00P2–No. 142474 (C. W.), and No. IZ73Z0–No. 152406 (S. S.). S. S., Z. S. P., and {\v Z}. {\v S}. acknowledge funding from the Serbian Ministry of Education and Science (Grant No. OI–171033). The DFT calculations were performed at UK (Archer) and Swedish (Beskow) supercomputing facilities, available through Grant No. PRACE DECI–13. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",
year = "2018",
month = dec,
day = "18",
doi = "10.1103/PhysRevLett.121.257202",
language = "English",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "25",
}