KDP Impurity Effects on Antiferroelectric Phase Transition of ADP Crystal*
- 1 January 1985
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 24 (S2)
- https://doi.org/10.7567/jjaps.24s2.969
Abstract
Complementary to our previous work on (KDP)1-x (ADP) x crystals we have studied on the temperature dependence of dielectric constants ε a and ε c of (ADP)1-x (KDP) x crystals between x=0 and x=0.07. Phase transition temperature T N(x) of (ADP)1-x ,(KDP) x crystal was observed to decrease at the rate of dT N/dx≃-250°K as KDP impurity concentration x was increased in this low concentration limit of x\lesssim0.07. Proton tunnelling effect seems to be important to understand the observed impurity effects in both KDP and ADP systems.Keywords
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