Complex magnetic phase in submonolayer Fe stripes on Pt(997)

J. Honolka, T. Y. Lee, K. Kuhnke, D. Repetto, V. Sessi, P. Wahl, A. Buchsbaum, P. Varga, S. Gardonio, C. Carbone, S. R. Krishnakumar, P. Gambardella, M. Komelj, R. Singer, M. Fähnle, K. Fauth, G. Schütz, A. Enders, and K. Kern
Phys. Rev. B 79, 104430 – Published 27 March 2009

Abstract

Correlations between magnetism and morphology of iron nanostructures of monatomic height on Pt(997) substrates are studied using x-ray magnetic circular dichroism as well as scanning tunneling microscopy and helium scattering. A drastic collapse of the average magnetization by more than a factor of 4 is observed when increasing the iron coverage from 0.1 to 0.2 ML. This effect goes along with a softening of the magnetic anisotropy energy and a gradual reorientation of the magnetic easy axis from in plane to out of plane. The experimental findings together with electronic density-functional calculations suggest the formation of a complex magnetic phase in corrugated rim regions of Fe islands, leading to both ferromagnetic and antiferromagnetic exchange couplings of Fe moments depending on their various local bonding configurations.

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  • Received 8 July 2008

DOI:https://doi.org/10.1103/PhysRevB.79.104430

©2009 American Physical Society

Authors & Affiliations

J. Honolka1,*, T. Y. Lee1, K. Kuhnke1, D. Repetto1, V. Sessi1, P. Wahl1, A. Buchsbaum2, P. Varga2, S. Gardonio3, C. Carbone3, S. R. Krishnakumar4, P. Gambardella5, M. Komelj6, R. Singer7, M. Fähnle7, K. Fauth7, G. Schütz7, A. Enders1, and K. Kern1,8

  • 1Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
  • 2Institut für Allgemeine Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10/134, A 1040 Wien, Austria
  • 3Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Area Science Park, 34012 Trieste, Italy
  • 4International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34100 Trieste, Italy
  • 5Institució Catalana de Recerca i Estudis Avançats (ICREA) and Centre d’Investigacions en Nanociència i Nanotecnologia (CSIC-ICN), UAB Campus, 08193 Bellaterra, Spain
  • 6Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
  • 7Max-Planck-Institut für Metallforschung, Heisenbergstrasse 13, 70569 Stuttgart, Germany
  • 8Institut de Physique des Nanostructures, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

  • *j.honolka@fkf.mpg.de

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Issue

Vol. 79, Iss. 10 — 1 March 2009

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