Effect of uniaxial stress in superprotonic phase transition in Cs 3H(SeO 4) 2

We have carried out the electrical conductivity measurement under the uniaxial stress in the hydrogen-bonded superprotonic conductor Cs 3H(SeO 4) 2. It is found that the increase of the superprotonic phase transition temperature is observed by the uniaxial stress along the b axis at room temperature...

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Bibliographic Details
Published inSolid state ionics Vol. 179; no. 21; pp. 1125 - 1127
Main Authors Matsuo, Y., Tanaka, Y., Hatori, J., Ikehata, S.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2008
Subjects
Ferroelasticity
Hydrogen-bonded crystal
Phase transition
Superprotonic conductor
Ferroelasticity
Hydrogen-bonded crystal
Superprotonic conductor
Phase transition
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Summary:We have carried out the electrical conductivity measurement under the uniaxial stress in the hydrogen-bonded superprotonic conductor Cs 3H(SeO 4) 2. It is found that the increase of the superprotonic phase transition temperature is observed by the uniaxial stress along the b axis at room temperature. On the other hand, no change of phase transition temperature is observed by the uniaxial stress along the c axis. It is also found from the viewpoint of free energy that the value of spontaneous strain a 0 in the a– b plane is closely related to the increase of the phase transition temperature under the uniaxial stress. From these results, we deduce that the increase of the superprotonic phase transition temperature by the uniaxial stress is caused by the suppression of the release of the spontaneous strain in the a– b plane.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2008.01.013