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


Singha, A; Donati, F; Natterer, F D; Wäckerlin, C; Stavrić, S; Popović, Z S; Šljivančanin, Ž; Patthey, F; Brune, H (2018). Spin Excitations in a 4f−3d Heterodimer on MgO. Physical Review Letters, 121(25):257202.

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.

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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Uncontrolled Keywords:General Physics and Astronomy
Language:English
Date:18 December 2018
Deposited On:18 Jan 2019 15:05
Last Modified:25 Sep 2019 00:02
Publisher:American Physical Society
ISSN:0031-9007
OA Status:Green
Publisher DOI:https://doi.org/10.1103/physrevlett.121.257202
Project Information:
  • : FunderSNSF
  • : Grant IDPP00P2_176866
  • : Project TitleControlling Elementary Excitations in Correlated Systems
  • : FunderSNSF
  • : Grant IDPZ00P2_167965
  • : Project TitleSingle atom and molecule radio wave absorption spectroscopy

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