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Spin-wave excitations in finite chain segments of the diluted one-dimensional Heisenberg antiferromagnet \(CsM{n_{1 - x}}M{g_x}B{r_3}\)

  • A. Furrer
  • H.-U. Güdel
Article

Abstract:

The inelastic neutron scattering technique was employed to study the magnetic excitation spectra in the diluted one-dimensional Heisenberg antiferromagnet CsMn1-xMgxBr3 (x=0, 0.05, 0.10, 0.25, 0.50). The spectral response is interpreted in terms of spin-wave excitations in finite chain segments of Mn2+ ions, which are found to exist as long as the chain length exceeds twice the wavelength of the spin excitation. This limit determines the crossover into the mesoscopic regime.

PACS. 75.30.Ds Spin waves - 75.40.Gb Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) - 75.50.Ee Antiferromagnetics 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • A. Furrer
    • 1
  • H.-U. Güdel
    • 2
  1. 1.Laboratory for Neutron ScatteringEidgenössische Technische Hochschule Zürich and Paul Scherrer InstitutVilligen PSISwitzerland
  2. 2.Department of ChemistryUniversität BernBern 9Switzerland

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