Pressure-driven relaxation processes in nanocomposite ionic glass LiFe$_{0.75}$V$_{0.10}$PO$_{4}$

TL;DR

This study investigates how high temperature and pressure treatments affect the density, electric conductivity, and relaxation processes in nanocrystallized ionic glass LiFe$_{0.75}$V$_{0.10}$PO$_{4}$, revealing significant changes and phase transition behaviors.

Contribution

It provides new insights into the effects of high pressure and temperature on relaxation dynamics and phase transitions in nanocomposite ionic glasses, with detailed analysis of conductivity and relaxation time behavior.

Findings

8% increase in density under high pressure.

Two decades increase in electric conductivity after treatment.

Identification of maxima and crossovers in glass and crystallization temperatures.

Abstract

This paper presents results for systems formed in a solid glassy state after nanocrystallization process above the glass temperature. We analyze electric conductivity and relaxation processes after such treatment under high temperature (HT) and high pressure (HP-HT) as well. The latter leads to ca. 8% increase of density, two decades (100) increase of electric conductivity as well as qualitative changes in relaxation processes. The previtreous-type changes of the relaxation time on cooling is analyzed by the use of critical-like and the 'critical-activated' description. Presented results correspond well with obtained for this material and shown in ref. [8]. The evidence for pressure evolution of the glass and crystallization temperatures, indicating the unique possibility of maxima and crossovers is also reported.