Q-Dependence of the Soliton Response in CsNiF3 at T = 10K and H = 5 kg

  • K. Kakurai
  • J. K. Kjems
  • M. Steiner
Part of the NATO Advanced Study Institutes Series book series (NSSB, volume 50)


Recently the first direct experimental evidence of solitons in the one-dimensional (I-D) ferromagnetic chain system CsNiF3 with easy plane anisotropy was reported by Kjems and Steiner [1]. They observed a quasi-elastic component in the dynamic structure factor which was interpreted within the theoretical framework developed by Mikeska [4] for a I-D XY-ferromagnet in an applied field. Mikeska had showed that the spin dynamics of such systems are described by the Sine-Gordon equation and this enabled him to predict explicitly the characteristic temperature and field dependence of the scattering due to non-linear modes -such as kinks or solitons. The predictions agreed very well with the results of the first neutron scattering experiment [1]. Another important prediction of the theory is the wavevector dependence of the energy width and of the integrated quasielastic intensity. This has been measured in a subsequent experiment and the results are reported here.


Background Subtraction Energy Width Spin Diffusion Direct Experimental Evidence Condense Matter System 
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  1. [1]
    J.K. Kjems and M. Steiner, Phys. Rev. Lett. 41 (1978) 1137ADSCrossRefGoogle Scholar
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    M. Steiner: these proceedingsGoogle Scholar
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    M. Steiner, J. Villain and C. Windsor: Adv. Phys. 25, 87 (1976)ADSCrossRefGoogle Scholar
  4. [4]
    H.J. Mikeska, J. Phys. C., 11 L29 (1978)CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • K. Kakurai
    • 1
  • J. K. Kjems
    • 2
  • M. Steiner
    • 1
  1. 1.Hahn-Meitner-InstituteBerlin 39West Germany
  2. 2.Risø National LaboratoryRoskildeDenmark

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