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양자나노과학 연구단
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Spin Excitations in a 4f−3d Heterodimer on MgO

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Title
Spin Excitations in a 4f−3d Heterodimer on MgO
Author(s)
A. Singha; F. Donati; F. D. Natterer; C. Wäckerlin; S. Stavrić; Z. S. Popović; Ž. Šljivančanin; F. Patthey; H. Brune
Publication Date
2018-12
Journal
PHYSICAL REVIEW LETTERS, v.121, no.25, pp.257202 -
Publisher
AMER PHYSICAL SOC
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.© 2018 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/5359
ISSN
0031-9007
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > Journal Papers (저널 논문)
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PhysRevLett.121.257202.pdfDownload

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