Schmidt, V. HugoSchnackenberg, P. T.Western, Arthur B.Baker, A. G.Bacon, Charles R.Crummett, W. P.2015-04-172015-04-171980-01V.H. Schmidt, P.T. Schnackenberg, A.B. Western, A.G. Baker, C.R. Bacon, and W.P. Crummett, “Dielectric studies of critical and tricritical phenomena in KDP and RDP,� Ferroelectrics 24, 275-280 (1980)0015-0193https://scholarworks.montana.edu/handle/1/8983Our method of obtaining and analyzing dielectric data for KDP is reviewed, which demonstrated that KDP has a tricritical point between two and three kbar pressure. We also describe our method for obtaining the critical exponents r and d. Our experimental results for KDP are summarized. New results are presented for RDP which agree with the conclusion of others that its transition is of second order at ambient pressure.Condensed matter physicsPhysicsArticle