Open AccessBRILLOUIN SCATTERING FROM BCVIG SINGLE CRYSTALS
Author(s) -
Pengxiang Zhang,
Pang Yu-Zhang,
G. Güntherodt,
R. Mock
Publication year - 1987
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.36.577
Subject(s) - brillouin zone , brillouin scattering , magnon , condensed matter physics , spin wave , dispersion relation , scattering , materials science , dispersion (optics) , physics , spin (aerodynamics) , optics , laser , ferromagnetism , thermodynamics
Magnon spectra were measured by means of Brillouin scattering from single crystals BCVIG (Bi3-2xCa2xFe5-xVxO12). We obtained a continuous band, including the bulk mag-non peak, which has been observed by Sandercock et al. in YIG, and Liu and Zhang et al. in Bi-YIG. The measured dispersion relation of the magnon band was analysed based on the theory of dipole-exchange spin waves. This measurement also show that the spin wave stiffness constant D is much larger than that of YIG and Bi-YIG. The reason of the lager D is discussed and its dependence on the incident laser power was studied.