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Magnetic ordering of spin systems having fractal dimensions Experimental study

Author

Listed:
  • T. Naito
  • H. Yamamoto
  • K. Okuda
  • K. Konishi
  • H. Mayama
  • D. Yamaguchi
  • S. Koizumi
  • K. Kubo
  • T. Nakamura

Abstract

It is well-known that cooperative properties such as magnetic ordering can depend on the samples’ dimensions (Ds) in a qualitative way. However, there have been no samples with well-defined non-integer Ds. The dimension of a given sample has been always discussed on the anisotropy of the electronic/crystal/magnetic structures, which has no definition suitable for quantitative discussion on dimensions vs. properties. On the other hand a particular type of porous samples, i.e. fractal bodies, can have well-defined non-integer Ds dependent exclusively on the geometrical feature of structures, and physical properties of such materials remains unexplored. This paper reports on magnetic ordering in samples covering 2.5 ≤ D ≤ 3, in addition to a way of precise control of the fractal dimensions of given samples simply by wax (alkylketene dimer). The results show that the magnetic ordering temperatures, i.e. Néel temperatures (T N s), of CoO depend on D, and rapidly enhance immediately below D = 3. This means that one can control or enhance the critical temperature simply by tuning D with keeping the remaining magnetic properties unchanged. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Suggested Citation

  • T. Naito & H. Yamamoto & K. Okuda & K. Konishi & H. Mayama & D. Yamaguchi & S. Koizumi & K. Kubo & T. Nakamura, 2013. "Magnetic ordering of spin systems having fractal dimensions Experimental study," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 86(10), pages 1-9, October.
    • Handle: RePEc:spr:eurphb:v:86:y:2013:i:10:p:1-9:10.1140/epjb/e2013-40353-3
    DOI: 10.1140/epjb/e2013-40353-3
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    Cited by:

    1. Rami Ahmad El-Nabulsi & Waranont Anukool, 2023. "A generalized nonlinear cubic-quartic Schrodinger equation and its implications in quantum wire," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 96(5), pages 1-8, May.

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    Keywords

    Solid State and Materials;

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