Abstract

The EPR spectra of Mn2+ probe have been investigated in Rb2ZnCl4 (RZC) crystals. Temperature changes of EPR line position and local line width in the range of paraelectric-incommensurate phase transition have been described on the basis of the simple “local” model. EPR data confirm non-classical character of RZC critical properties, corresponding to universality class of 3d XY Heizenberg model.

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