"Static" Jahn—Teller-induced random strains inTmxY1−xVO4

Abstract

Electron paramagnetic resonance of ${\mathrm{Tm}}_x{\mathrm{Y}}_{1-x}\mathrm{V}{\mathrm{O}}_4$: ${\mathrm{Gd}}^{3+}$ shows that the fluctuating random strains in this system are due to long-range interactions between ${\mathrm{Tm}}^{3+}$ Jahn-Teller ions. The fluctuations sharply slow down at low temperatures and the strains may be considered "static" in the time scale (${10}^{-9\mathrm{}}$ sec) of the experiments.