Journal ArticleDOI
Dielectric Study of Phase Transitions in Cs3H(SeO4)2 and Its Isotope Effect
TLDR
In this article, the dielectric constants along the c'axis of Cs 3 H(SeO 4 ) 2 and its deuterated crystal were measured in a temperature range from 5 K to 460 K.Abstract:
The dielectric constants along the c ' axis of Cs 3 H(SeO 4 ) 2 and its deuterated crystal were measured in a temperature range from 5 K to 460 K. It was found that Cs 3 H(SeO 4 ) 2 undergoes three phase transitions at 451 K, 364 K and 50 K. The dielectric constant of Cs 3 H(SeO 4 ) 2 shows a small peak at 50 K, and it obeys the Curie-Weiss law above 50 K. The transition temperature (50 K) is increased to 168 K by deuteration, showing a large isotope effect, while other two transition temperatures do not change appreciably.read more
Citations
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Solid acid proton conductors: from laboratory curiosities to fuel cell electrolytes
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A review on phosphate based, solid state, protonic conductors for intermediate temperature fuel cells.
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Macroscopic and structural effects of hydrogen-bond transformations
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References
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Journal ArticleDOI
Dielectric Properties and Phase Transitions in X3H(SO4)2 and X3D(SO4)2 Crystals(X:K,Rb)
TL;DR: In this paper, the dielectric constants of pseudo-hexagonal c-plates of K 3 H(SO 4 ) 2, Rb 3 H (SO 4 ), and their deuterated analogues were measured under room temperature.
Journal ArticleDOI
The crystal structure of triammonium hydrogen disulphate, (NH4)3H(SO4)2
S. Suzuki,Y. Makita +1 more
Journal ArticleDOI
Ferroelectric Phase Transition in (NH 4 ) 3 H(SeO 4 ) 2
TL;DR: In this paper, the dielectric properties of a single crystal (NH 4 ) 3 H(SeO 4 ) 2 were measured below room temperature and two phase transitions were found at around +2°C and at -92°C.
Journal ArticleDOI
Dielectric and Dilatometric Studies of Phase Transitions in (ND 4 ) 3 D(SeO 4 ) 2 and Isotope Effect
TL;DR: In this article, the Curie-Weiss constant and spontaneous polarization of the deuterated crystal are 3.7×10 3 K and 2.4 µC·cm -2 at -170^° C, respectively.
Journal ArticleDOI
Dielectric Properties and Phase Transition in Rb 3 H(SeO 4 ) 2 and Rb 3 D(SeO 4 ) 2 at Low Temperature
TL;DR: In this paper, the dielectric constants of pseudo-hexagonal c -plates of Rb 3 H(SeO 4 ) 2 were measured below room temperature and showed a λ-type maximum at 92 K indicating that there is a phase transition induced by deuteration.