Theory of the high-frequency properties of multisublattice, low-dimensional, relativistically noncoIlinear antiferromagnets
V. N. KrivoruchkoDonetsk Physicotechnical Institute, Academy of Sciences of the Ukrainian SSR and Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , Khar’kovA. A. StepanovDonetsk Physicotechnical Institute, Academy of Sciences of the Ukrainian SSR and Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , Khar’kovD. A. YablonskiĭDonetsk Physicotechnical Institute, Academy of Sciences of the Ukrainian SSR and Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , Khar’kov
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The antiferromagnetic resonance frequencies, the high-frequency magnetic susceptibility tensor, and the amplitudes of normal oscillations of a quasi-two-dimensional four-sublattice antiferromagnet with a relativistically noncollinear structure are found. A comparative analysis of the dynamical properties of low-dimensional and three-dimensional four-sublattice antiferromagnets is performed. It is shown that their dynamical behavior differs substantially, and in addition the properties of the low-dimensional multisublattice systems cannot be described on the basis of models with a smaller number of magnetic sublattices.
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