Abstract
The lithium rubidium molybdate compound LiRbMoO4 was prepared by the solid-state reaction method. XRD spectra revealed a single phase material with an orthorhombic structure. The internal Raman modes were observed at room temperature. The dielectric measurement exhibited three subsequent phase transitions: two structural transitions at the neighborhood of 397 K and 420 K followed by a ferro-paraelectric transition at 424 K. The Nyquist plot was proved to be a non-Debye relaxation mechanism. The combined spectroscopic plots of the imaginary part of electric impedance and modulus in the temperature range of 581–718 K at various frequencies confirmed the non-Debye behavior. The AC conductivity was found to follow the Jonscher’s universal dynamic law ωS, and the overlapping large polaron tunneling model (OLPT) was proposed to describe the conduction mechanism.
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Nasr, W.B., Rhaiem, A.B. Ferroelectric properties and alternative current conduction mechanisms of lithium rubidium molybdate. Ionics 25, 4003–4012 (2019). https://doi.org/10.1007/s11581-019-02921-w
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DOI: https://doi.org/10.1007/s11581-019-02921-w