Hybridization of electromagnetic, spin and acoustic waves in magnetic   having conical spiral ferromagnetic order
  The spectrum of hybrid electromagnetic-spin-acoustic waves for magnetic having conical spiral ferromagnetic structure defined by heterogeneous exchange and relativistic interactions have been received. The possibility of resonant interaction of spin, electromagnetic and acoustic waves has been shown. The electromagnetic waves reflectance from the half-infinity layer of magnetic having conical spiral ferromagnetic order has been calculated for different values of external magnetic field (angle of spiral). The acoustic Faradey effect has been considered. 
Igor V. Bychkov, Dmitry A. Kuzmin, Vladimir G. Shavrov
cond-mat.other cond-mat.mtrl-sci