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Magnetic-state control in a 3d dimer on a metallic substrate

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An Erratum to this article was published on 01 September 2015

Abstract

The Alexander-Anderson model is used to investigate the magnetic states of a dimer composed of 3d-element atoms on a metallic substrate in the local mean-field approximation enabling the examination of noncollinear magnetic states. The magnetic moments localized near the dimer atoms are calculated self-consistently depending on the angle θ between them under the action of an external magnetic field. The dependence between the angle θ of the ground state and the number N of d electrons around the dimer atom is determined. The transition between the antiferromagnetic and ferromagnetic exchange interactions of the dimer magnetic moments is implemented with increasing N. The dimer ground state near the transition is noncollinear, cannot be described by the Heisenberg model, and is very sensitive to the influence of an external magnetic field. The interaction between 3d-dimer atoms and the substrate, gas adsorption, and external fields can vary the number of d electrons, making it possible to control magnetic states on an atomic scale.

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Authors and Affiliations

  1. St. Petersburg State University, St. Petersburg, 199034, Russia

    M. G. Dudnik & V. M. Uzdin

  2. Petersburg Nuclear Physics Institute, National Research Centre Kurchatov Institute, Gatchina, Leningrad oblast, 188300, Russia

    V. M. Uzdin

Authors
  1. M. G. Dudnik
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  2. V. M. Uzdin
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Correspondence to M. G. Dudnik.

Additional information

Original Russian Text © M.G. Dudnik, V.M. Uzdin, 2015, published in Poverkhnost’. Rentgenovskie, Sinkhrotronnye i Neitronnye Issledovaniya, 2015, No. 6, pp. 15–20.

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Dudnik, M.G., Uzdin, V.M. Magnetic-state control in a 3d dimer on a metallic substrate. J. Surf. Investig. 9, 540–545 (2015). https://doi.org/10.1134/S1027451015030210

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