Scattering on spin fluctuations in itinerant quantum disordered ferromagnets near quantum phase transition

Details Scattering on spin fluctuations in itinerant quantum disordered ferromagnets near quantum phase transition Scattering on spin fluctuations in itinerant quantum disordered ferromagnets near quantum phase transition

1999-06-28

arxiv.org/abs/cond-mat/9906416v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, latex, no figures; to appear in Phys. Stat. Sol. (b)

Scientific paper

Taking into account the long-ranged spin interactions due to weak localization effects in disordered itinerant ferromagnets the scattering of both electrons and neutrons on critical spin fluctuations near quantum phase transition is considered. It is shown that for the case of low electron density, when k_F \xi \ll 1, where k_F is the Fermi momentum and \xi is the magnetic correlation length, the transport cross section of electrons is proportional to conventional critical fluctuations in absence of weak localization effects. However, the intensity of the multiple small-angle neutron scattering becomes exponentially small as compared with the intensity of the multiple scattering by conventional critical fluctuations.

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