Title :
Spin waves in the semi-infinite FeBr2 field-induced metamagnet
Author :
Rudzinski, W. ; Maciejewski, W.
Author_Institution :
Inst. of Phys., Adam Mickiewicz Univ., Poznan, Poland
fDate :
3/1/1994 12:00:00 AM
Abstract :
Properties of surface spin waves are studied in the FeBr2 field-induced metamagnet that consists of ferromagnetically ordered layers, with intralayer nearest-neighbour ferromagnetic exchange coupling, intralayer next-nearest-neighbour antiferromagnetic exchange coupling and interlayer antiferromagnetic exchange coupling as well as a strong three-ion anisotropy. Surface spin wave modes are calculated for the (001) surface and for the paramagnetic phase at low temperatures. By allowing the surface exchange parameters to deviate from the bulk values, full richness of the surface spin-wave spectra is displayed. The problem of the stability of the ground state of the system is also discussed
Keywords :
antiferromagnetic properties of substances; exchange interactions (electron); ferromagnetic properties of substances; iron compounds; magnetic anisotropy; magnetic surface phenomena; metamagnetism; paramagnetic properties of substances; spin waves; FeBr2; antiferromagnetic exchange coupling; exchange coupling; ferromagnetic exchange coupling; ferromagnetically ordered layers; field-induced metamagnet; ground state stability; paramagnetic phase; surface spin waves; three-ion anisotropy; Anisotropic magnetoresistance; Antiferromagnetic materials; Green function; Lattices; Magnetic analysis; Magnetic fields; Optical surface waves; Stability; Surface waves; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
