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Longitudinal spin fluctuations in quasi-2D antiferromagnets

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Zeitschrift für Physik B Condensed Matter

Abstract

The longitudinal fluctuations (LF) in quasi-2D antiferromagnets are considered. The temperature and frequency dependence of the longitudinal susceptibility is determined. The contribution of the LF to the inelastic neutron scattering is discussed and it is shown that it has to be taken into account in some cases. If spin-wave interaction is neglected the staggered susceptibility diverges atk=0 and ω»0. As a result, the spin-wave interaction should be considered. It is shown that the critical dimension for this problem is equal to three and four forT=0 andT≠0, respectively.

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Authors and Affiliations

  1. Physik-Department, Humboldt Universität Berlin, Invalidenstrasse 110, DDR-1040, Berlin, German Democratic Republic

    S. Braune

  2. Leningrad Nuclear Physics Institute, Gatchina, 188353, Leningrad, USSR

    S. W. Maleew

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  1. S. Braune
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  2. S. W. Maleew
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Braune, S., Maleew, S.W. Longitudinal spin fluctuations in quasi-2D antiferromagnets. Z. Physik B - Condensed Matter 81, 69–73 (1990). https://doi.org/10.1007/BF01454215

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  • DOI: https://doi.org/10.1007/BF01454215

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