• Долгаков, И.A.; Набережнов, A.A.; Алексеева, O.A.; Борисов, C.; Симкин, B.; Tovar, M.: Temperaturnaja evoljucija kristallicheskoj struktury myltiferroidnych tverdych rastvorov (1-x)Pb(Fe2/3W1/3O3)-(x)PbTiO3. Fizika tverdogo tela : FTT = Solid state physics 59 (2017), p. 1940-1944

10.21883/FTT.2017.10.44962.087
Open Access Version

Abstract:
Abstract—Neutron diffraction was used to study the temperature evolution of the structure of (1 – x)Pb · (Fe2/3W1/3O3)–(x)PbTiO3 solid solutions of two compositions x = 0.2 and 0.3, in which the existence of the morphotropic phase boundary (MPB) is observed, in the temperature range 90–400 K. It is shown that the system is in the two-phase state, in which the cubic and the tetragonal phases coexist, even at temperatures higher than MPB. The temperature dependences of the phase percentages were obtained. The static displacements of lead ions from the crystallographic position (000) are estimated in terms of a multiwell potential.