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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Published in | Crystallography reports Vol. 66; no. 3; pp. 508 - 513 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Moscow
Pleiades Publishing
01.05.2021
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 1063-7745 1562-689X |
DOI: | 10.1134/S1063774521030068 |