Magnetic interactions of Mn clusters supported on Cu

Anders Bergman, Lars Nordström, Angela Burlamaqui Klautau, Sonia Frota-Pessôa, and Olle Eriksson
Phys. Rev. B 73, 174434 – Published 31 May 2006

Abstract

It is demonstrated that the magnetic interactions can be drastically different for nanosized systems compared to those of bulk or surfaces. Using a real-space formalism we have developed a method to calculate noncollinear magnetization structures and hence exchange interactions. Our results for magnetic Mn clusters supported on a Cu(111) surface show that the magnetic ordering as a rule is noncollinear and cannot always be described by using a simple Heisenberg Hamiltonian. We argue that the use of ab initio calculations allowing for noncollinear coupling between atomic spins constitutes an efficient and reliable way of analyzing nanosized magnets.

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  • Received 22 December 2005

DOI:https://doi.org/10.1103/PhysRevB.73.174434

©2006 American Physical Society

Authors & Affiliations

Anders Bergman1,*, Lars Nordström1, Angela Burlamaqui Klautau2, Sonia Frota-Pessôa3, and Olle Eriksson1

  • 1Department of Physics, Uppsala University, Box 530, Sweden
  • 2Departamento de Física, Universidade Federal do Pará, Belém, PA, Brazil
  • 3Instituto de Fisica, Universidade de Sao Paulo, CP 66318, Sao Paulo, SP, Brazil

  • *Electronic address: Anders.Bergman@fysik.uu.se

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Vol. 73, Iss. 17 — 1 May 2006

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