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Spin Excitations in a 4f-3d Heterodimer on MgO

Title
Spin Excitations in a 4f-3d Heterodimer on MgO
Authors
Singha A.Donati F.Natterer F.D.Wäckerlin C.Stavrić S.Popović Z.S.Šljivančanin A.Z.Patthey F.Brune H.
Ewha Authors
Fabio Donati
Issue Date
2018
Journal Title
Physical Review Letters
ISSN
0031-9007JCR Link
Citation
Physical Review Letters vol. 121, no. 25
Publisher
American Physical Society
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
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.
DOI
10.1103/PhysRevLett.121.257202
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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