On the theory of magnetic field dependence of heat conductivity in   dielectric in isotropic model
  Phonon polarization in a magnetic field is analyzed in isotropic model. It is shown, that at presence of spin-phonon interaction phonon possess circular polari-zation which causes the appearance of heat flux component perpendicular both to temperature gradient and magnetic field. 
L.A.Maksimov and T.V.Khabarova