Abstract
Deuteration effects on the critical relaxation in hydrogen-bonded ferroelectric glycine phosphite have been examined by the measurements of the complex dielectric constants along the ferroelectric b-axis of a series of partially deuterated crystals. The dielectric dispersion for crystals of low deuteration molar fraction was found to be composed of two Cole-Cole types with clearly different relaxation times. The shorter relaxation time shows a nearly classical mean-field exponent and the relaxation time at the temperatures with the same distance fromT C increases monotonically with the fraction similarly to the deuteration in CsH2PO4. The longer relaxation time decreases with the fraction.
Published Version
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