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  1. pubs.acs.org

    The magnetic properties of transition-metal ions are generally described by the atomic spins of the ions and their exchange coupling. The orbital moment, usually largely quenched due the ligand field, is then seen as a perturbation. In such a scheme, S = 1/2 ions are predicted to be isotropic. We investigate a Co(II) complex with two antiferromagnetically coupled 1/2 spins on Au(111) using low ...
  2. pubs.acs.org

    (di-Co, Figure 1a) composed of two spin-1/2 ions adsorbed on Au(111). Combining STM, X-ray magnetic circular dichroism (XMCD), and density functional theory (DFT), we show that each of the two Co ions has an orbital moment of similar magnitude as the spin moment. This orbital moment, through spin−orbit coupling, causes magnetic anisoptropy ...
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  4. ncbi.nlm.nih.gov

    The orbital momentum of transition metal ions strongly depends on the atom coordination and rapidly quenches to the negligible values in bulk. 1 The magnetic properties of solids and molecules are therefore mainly determined by the atomic spins and their exchange coupling. The effect of the remaining orbital moment may be treated as a perturbation and is at the origin of magnetic anisotropy ...
  5. digital.csic.es

    The orbital moment, usually largely quenched due the ligand field, is then seen as a perturbation. In such a scheme, S = 1/2 ions are predicted to be isotropic. We investigate a Co(II) complex with two antiferromagnetically coupled 1/2 spins on Au(111) using low-temperature scanning tunneling microscopy, X-ray magnetic circular dichroism, and ...
  6. bib-pubdb1.desy.de

    disabledatV=30meVandI=500pA.Evolutionof(b) μspin and (c) μorb with temperature (black dots) as inferred from XMCDspectraondi-Copowder.Thedashedredandbluelines are angle-averaged simulations with and without spin−orbit coupling (Supporting Information Section 3). The simulations without spin−orbit coupling (blue) were done with J = 9meV,
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  8. researchgate.net

    Request PDF | Large Orbital Moment of Two Coupled Spin-Half Co Ions in a Complex on Gold | The magnetic properties of transition-metal ions are generally described by the atomic spins of the ions ...
  9. semanticscholar.org

    Figure 3. Magnetic anisotropy and origin of the orbital moment. (a) Top and (b) side views of a di-Co complex. According to our DFT calculations in the gas-phase with spin−orbit coupling, the spin configuration shown with red arrows (along the x axis) is 3.58 and 3.77 meV lower in energy than the green (y axis) and blue (z axis) configurations, respectively. Comparable values of 4.17 and 3. ...
  10. semanticscholar.org

    Figure 4. Tuning the magnetic anisotropy through manipulation of tert-butyl moieties. (a) Topograph (height range 2.8 nm) of a diCo complex showing states 1 and 2 (arrows) of the tert-butyl moiety that are usually obtained upon injection of current (2.7 V, ≈3 nA). (b) dI/dV spectra acquired atop a Co center before (black) and after (red) manipulation of the second top-left tertbutyl moiety ...
  11. pubmed.ncbi.nlm.nih.gov

    The magnetic properties of transition-metal ions are generally described by the atomic spins of the ions and their exchange coupling. The orbital moment, usually largely quenched due the ligand field, is then seen as a perturbation. In such a scheme, <i>S</i> = 1/2 ions are predicted to be isotropic …
  12. Supporting Information: Large Orbital Moment of Two Coupled Spin-Half Co Ions in a Complex on Gold Chao Li,†Roberto Robles,∗,‡Nicolas Lorente,‡,¶Sanjoy Kr Mahatha,§ Sebastian Rohlf, †Kai Rossnagel,,§Alessandro Barla,∥Boris V. Sorokin,⊥ Stefano Rusponi,⊥Philippe Ohresser,# Sara Realista,@ Paulo N. Martinho,@ Torben Jasper-Toennies, †Alexander Weismann, Richard Berndt,∗, and

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