Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
64 (1988), S. 947-949
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The surface effect on the spin-wave spectrum in two-sublattice ferrimagnets is investigated by means of the retarded Green's function equation of motion method. The two-sublattice Heisenberg model with nearest neighbor interactions is assumed in our discussion. We find that for a NaCl structure, the (001) free surface spin-wave spectrum splits up into acoustic and optical branches as usual. For the case of a CsCl structure, the (001) surface spin wave depends solely upon the nature of the magnetic ions in the surface layer. It has only the optical branch when the surface layer belongs to one sublattice, and has only the acoustic branch when the surface layer belongs to the other. Other properties are also discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.341902
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