Surface Evolution at the Phase Transitions in (NH4)3H(SeO4)2 Crystals

The (NH 4 ) 3 H(SeO 4 ) 2 crystals in the temperature range of 296–343 K and the evolution of their surface at phase transitions have been studied by atomic force microscopy. Data on morphology and local electrical characteristics of crystal surface are obtained. Local current–voltage characteristic...

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Bibliographic Details
Published inCrystallography reports Vol. 66; no. 3; pp. 508 - 513
Main Authors Gainutdinov, R. V., Tolstikhina, A. L., Selezneva, E. V., Makarova, I. P.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.05.2021
Springer Nature B.V
Subjects
Atomic force microscopy
Crystal surfaces
Crystallography and Scattering Methods
Crystals
Current voltage characteristics
Evolution
Local current
Morphology
Phase transitions
Physics
Physics and Astronomy
Surface and Thin Films
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Summary:The (NH 4 ) 3 H(SeO 4 ) 2 crystals in the temperature range of 296–343 K and the evolution of their surface at phase transitions have been studied by atomic force microscopy. Data on morphology and local electrical characteristics of crystal surface are obtained. Local current–voltage characteristics are measured, and the existence of structural phase transition to the phase with superprotonic conductivity at T ≈ 308 K is confirmed. A layer of non-conducting phase of variable composition is shown to appear on the crystal surface at the phase transitions.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774521030068