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Experimental study of the spindynamics in the 1-D-ferromagnet with planar anisotropy, CsNiF3, in an external magnetic field

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Zeitschrift für Physik B Condensed Matter

Abstract

The results of a detailed inelastic neutron scattering study of the spindynamics in CsNiF3 in an external magnetic field are presented. Results have been obtained for different combinations of the correlation function <S α Sα> (α=x, y, z) in order to analyse theH, T, q c-dependence of both, the central component and the spinwave scattering. These results cannot be explained by a multispin-wave theory alone, but it is necessary to introduce solitons in order to describe the experimental findings. It is found that under certain conditions the contribution from solitons and from two-spinwave processes have the same size. These results show that the spindynamics in this system in fields 2.5kOe<H<10kOe and5K≦...15K are similar to that in a sine-Gordon system. ForT>15K this picture breaks down probably due to the finite size of the easy plane anisotropy energy.

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Authors and Affiliations

  1. Bereich Kernchemie und Reaktor, Hahn-Meitner-Institut für Kernforschung Berlin GmbH, Glienicker Strasse 100, Postfach 390128, D-1000, Berlin 39, Germany

    M. Steiner & K. Kakurai

  2. Risø National Laboratory, DK-4000, Roskilde, Denmark

    J. K. Kjems

Authors
  1. M. Steiner
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  2. K. Kakurai
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  3. J. K. Kjems
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Steiner, M., Kakurai, K. & Kjems, J.K. Experimental study of the spindynamics in the 1-D-ferromagnet with planar anisotropy, CsNiF3, in an external magnetic field. Z. Physik B - Condensed Matter 53, 117–142 (1983). https://doi.org/10.1007/BF01304200

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  • DOI: https://doi.org/10.1007/BF01304200

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