Symmetry analysis of the static and high-frequency properties of CuCI2 • 2H2O and CuCl2 • 2D2O
Yu. G. PashkevichPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, DonetsV. L. SobolevPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, DonetsВ. Т. ТелепаPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Donets
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We consider the ground states, antiferromagnetic resonance frequencies, and dynamic susceptibilities of CuCl2•2H2O and CuCl2 • 2D2O in terms of a four-sublattice model taking into account the Dzyaloshinskii interaction. We treat the case of a field H||Ox for T = 0. We show that for the two lowest AFMR branches the use of a four-sublattice model leads to the same results as in the two-sublattice model. We have studied the exchange branches of the spectrum as a function of magnetic field and we discuss the possibility of observing them in IR absorption spectra.
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