EPR-SPECTRUM OF CSDY(MOO4)(2) AND STRUCTU RAL PECULIARITIES OF MAGNETICALLY-ORDERED PHASE OF THE CRYSTAL

The angular dependences of the EPR spectrum of Dy3+ in the single crys tal CsDy(MoO4)(2) have been investigated at T = 4,2 K. It is found tha t the unit cell contains two magnetic uuequivalent centers with coinci dent extremal values of the g-factar effective tensor (g(a') = 3,7 +/- 0,2; g(b') = 1 +/- 0,5; g(c') = 13,4 +/- 0,5) but tensor axes are tur ned in space. Based on the energy estimation of dipole-dipole interact ions in the system, the conclusion about possible structure of the mag netically ordered state is made. The structure must contain chains of rare-earth ions oriented along c-axis and connected antiferromagnetica lly one to another.