Phase diagram of DyxTb1-xVO4 crystals with competing Jahn-Teller lattice distortions
Vasil'ev A. V. , Dvornikova A. E., Kazei Z. A., Mill' B. V. , Kaplan M. D. , Sokolov V. I.
A theoretical and experimental study has been made of structural phase transitions in Dyx Tb, _ x V04 crystals, in which the Jahn-Teller ions Dy3 + and Tb3 + cause competing spontaneous lattice deformations. In the system studied, structural phase transitions with a long-range order exist throughout the concentration interval, and a phase with two order parameters exists at x~0.5.