Abstract
Dielectric constant and hysteresis loops measurements have been performed in single crystals of deuterated triglycine sulfate (DTGS) in the vicinity of the transition temperature. In the range 0.02°C < Δ T < 0.60°C deviations from mean field behavior were observed. In the range 1°C < Δ T < 10°C the dielectric constant data fitted mean-field predictions fairly well. Using the experimental (non mean-field) values for the critical exponents in the temperature range closer to T c , the “scaling” equation of state h( x) = ( x 0 + x) β( δ-1) was seen to be fulfilled in a wide range of x = ( ΔT/ T c )/( P/ P 0) 1/ gb below and above T c . The same is true for TGS data, using classical values for the exponents.
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