The Changes of Thermal,Dielectric, and Optical Properties at Insertion of Small Concentrations of Ammonium to K3H(SO4)2 Crystals |
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| Authors: | E. V. Selezneva I. P. Makarova V. V. Grebenev I. A. Malyshkina V. A. Komornikov N. D. Gavrilova R. Chitra R. R. Choudhury |
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| Affiliation: | 1.Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”,Russian Academy of Sciences,Moscow,Russia;2.Faculty of Physics,Moscow State University,Moscow,Russia;3.Solid State Physics Division Bhabha Atomic Research Centre,Trombay, Mumbai,India |
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| Abstract: | The structure of (K1–x(NH4)x)3H(SO4)2 crystals with a low ammonium concentration and the behavior of their thermal, optical, and dielectric properties in a temperature range of 275–500 K have been investigated to clarify the influence of doping on the phase transition kinetics. An examination of unit-cell parameters of (K1 – x(NH4)x)3H(SO4)2 single crystals has confirmed the existence of a superprotonic phase transition at a temperature of ≈450K. The conducting properties of single-crystal and polycrystalline samples have been studied. |
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