Lowest Fe2+spin excitations in disordered Fe1-xMnxCl2mixtures by microwave absorption at high frequencies
- 30 September 1980
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 13 (27) , 5165-5175
- https://doi.org/10.1088/0022-3719/13/27/014
Abstract
Far-infrared absorption measurements in Fe1-xMnxCl2 are reported in the frequency range 60 to 600 GHz. The low-energy excitations of the Fe2+ spin system have been studied at low temperature over the whole range of concentration. At low Mn2+ concentration, in both antiferromagnetic and ferromagnetic phases, the authors observe a resonance line corresponding to the excitation of antiferromagnetic and ferromagnetic magnons. For x1(Fe-Fe)=1010 GHz. For larger concentrations (0.151<or=x0.5 the absorption signal becomes very broad.Keywords
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