Phase Transitions of KIO3 Ferroelectrics in Al2O3-Based Nanoporous Matrices


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Abstract

Temperature dependences of the linear permittivity ε' and the third harmonic amplitude γ of composites prepared by introducing ferroelectrics KIO3 into matrices of porous aluminum oxide Al2O3 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 Al2O3 pores decrease by 5 K and 24 K, respectively, with respect to bulk KIO3. The measurements of the dielectric properties do not reveal V → IV and II → I phase transitions in the composite samples.

About the authors

A. Yu. Milinskii

Blagoveshchensk State Pedagogical University

Author for correspondence.
Email: a.milinsky@mail.ru
Russian Federation, ul. Lenina 104, Blagoveshchensk, 675000

S. V. Baryshnikov

Blagoveshchensk State Pedagogical University; Amur State University

Email: a.milinsky@mail.ru
Russian Federation, ul. Lenina 104, Blagoveshchensk, 675000; Ignat’evskoe sh. 21, Blagoveshchensk, 675027

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