Open AccessИсследование фазовых переходов сегнетоэлектрика KIO-=SUB=-3-=/SUB=- в нанопористых матрицах на основе пленок Al-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-
Author(s) -
А.Ю. Милинский,
С. В. Барышников
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.03.45559.273
Subject(s) - permittivity , potassium iodate , dielectric , analytical chemistry (journal) , materials science , dielectric permittivity , phase transition , porosity , amplitude , oxide , iodine , transition metal , mineralogy , chemistry , condensed matter physics , composite material , optics , physics , metallurgy , biochemistry , optoelectronics , chromatography , catalysis
Temperature dependences of the linear permittivity ε' and the third harmonic amplitude γ_3ω of composites prepared by introducing ferroelectrics KIO_3 into matrices of porous aluminum oxide Al_2O_3 with pore sizes of 240 nm were studied. It is found that the IV → III and III → II structural transition temperatures of potassium iodide in Al_2O_3 pores decrease by 5 K and 24 K, respectively, with respect to bulk KIO_3. The measurements of the dielectric properties do not reveal V → IV and II → I phase transitions in the composite samples.