Phenomenological model of longitudinal spin fluctuations in itinerant antiferromagnets

  title={Phenomenological model of longitudinal spin fluctuations in itinerant antiferromagnets},
  author={A. Z. Solontsov and Vladimir P. Antropov},
  journal={Physical Review B},
We present the phenomenological analysis of the spectrum of longitudinal spin fluctuations in isotropic itinerant electron antiferromagnets with account of spin anharmonicity giving rise to coupling of transverse and longitudinal normal modes. The spectrum consists of a quasielastic part forming a central peak or a dip, depending on temperature and the Landau relaxation rate. Effects of spin-fluctuation coupling also give rise to an inelastic part of the spectrum which has a form of resonances… Expand
3 Citations
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