Ferromagnetism in one-dimensional monatomic metal chains

P. Gambardella (), A. Dallmeyer, K. Maiti, M. C. Malagoli, W. Eberhardt, K. Kern and C. Carbone
Additional contact information
P. Gambardella: Institut de Physique des Nanostructures, EPF-Lausanne
A. Dallmeyer: Institut für Festkörperforschung, Forschungszentrum Jülich
K. Maiti: Institut für Festkörperforschung, Forschungszentrum Jülich
M. C. Malagoli: Institut für Festkörperforschung, Forschungszentrum Jülich
W. Eberhardt: Institut für Festkörperforschung, Forschungszentrum Jülich
K. Kern: Institut de Physique des Nanostructures, EPF-Lausanne
C. Carbone: Institut für Festkörperforschung, Forschungszentrum Jülich

Nature, 2002, vol. 416, issue 6878, 301-304

Abstract: Abstract Two-dimensional systems, such as ultrathin epitaxial films and superlattices, display magnetic properties distinct from bulk materials1. A challenging aim of current research in magnetism is to explore structures of still lower dimensionality2,3,4,5,6. As the dimensionality of a physical system is reduced, magnetic ordering tends to decrease as fluctuations become relatively more important7. Spin lattice models predict that an infinite one-dimensional linear chain with short-range magnetic interactions spontaneously breaks up into segments with different orientation of the magnetization, thereby prohibiting long-range ferromagnetic order at a finite temperature7,8,9. These models, however, do not take into account kinetic barriers to reaching equilibrium or interactions with the substrates that support the one-dimensional nanostructures. Here we demonstrate the existence of both short- and long-range ferromagnetic order for one-dimensional monatomic chains of Co constructed on a Pt substrate. We find evidence that the monatomic chains consist of thermally fluctuating segments of ferromagnetically coupled atoms which, below a threshold temperature, evolve into a ferromagnetic long-range-ordered state owing to the presence of anisotropy barriers. The Co chains are characterized by large localized orbital moments and correspondingly large magnetic anisotropy energies compared to two-dimensional films and bulk Co.

Date: 2002
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/416301a Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:416:y:2002:i:6878:d:10.1038_416301a

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/416301a

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().