Deonarine, Samaroo2008-11-212008-11-212008-11-21https://hdl.handle.net/2139/749enPlease contact the West Indiana Division at the University of the West Indies,St.Augustine in order to view the full thesis. Contact: wimail@sta.uwi.eduMagnonsAntiferromagnetismSpin wavesFerromagnetic resonanceStudy of some symmetry and thermal properties of magnons in the antoferromagnets K2NiF4(2-D) and NiF2(3-D)Thesis