LONG-RANGE FERROMAGNETIC ORDER IN ONE-DIMENSIONAL MONATOMIC Co-CHAINS
Journal article

LONG-RANGE FERROMAGNETIC ORDER IN ONE-DIMENSIONAL MONATOMIC Co-CHAINS

  • GAMBARDELLA, P. Institut de Physique des Nanostructures, EPF-Lausanne, CH-1015 Lausanne, Switzerland
  • DALLMEYER, A. Institut für Festkörperforschung, Forschungszentrum Jülich, Jülich, D-52425, Germany
  • MAITI, K. Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400 005, India
  • MALAGOLI, M. C. Institut für Festkörperforschung, Forschungszentrum Jülich, Jülich, D-52425, Germany
  • EBERHARDT, W. Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung m.b.H., Albert-Einstein-Straße 15, 12489 Berlin, Germany
  • KERN, K. Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, D-70569 Stuttgart, Germany
  • CARBONE, C. Istituto di Struttura della Materia, Consiglio Nazionale delle Richerche, Area Science Park, I-34012 Trieste, Italy
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  • 2011-11-21
Published in:
  • International Journal of Nanoscience. - World Scientific Pub Co Pte Lt. - 2005, vol. 04, no. 05n06, p. 1029-1031
English Magnetism in low dimensions is a challenging problem for long time. As the dimensionality of the systems reduces, the fluctuations become more important and hence, the magnetic ordering tends to decrease. We find that one-dimensional monatomic chains of Co constructed on a Pt substrate exhibit long-range order below a threshold temperature in contrast to various theoretical results and expectations. The Co -chains have large localized orbital moment compared to that in the two-dimensional films and bulk Co . Therefore, the magnetic anisotropy energy is significantly large in this case. Thus, the observation of long-range ferromagnetic order in Co -chains may be attributed to the presence of anisotropy barriers due to the substrate.
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  • English
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https://sonar.ch/global/documents/130329
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