Structure and dielectric response of Na1 − x K x NO2 nanocomposite solid solutions

Autor:	E. Yu. Koroleva, A. V. Fokin, Sergey Vakhrushev, M. Glazman, N. M. Okuneva, A. A. Naberezhnov, I. V. Golosovsky, O. P. Smirnov, M. Tovar
Rok vydání:	2008
Předmět:	Permittivity Phase transition Nanocomposite Materials science Potassium Analytical chemistry chemistry.chemical_element Dielectric Condensed Matter Physics Electronic Optical and Magnetic Materials Premelting chemistry Dielectric loss Solid solution
Zdroj:	Physics of the Solid State. 50
ISSN:	1090-6460 1063-7834
Popis:	This paper reports on the results of the investigation into the thermal evolution of the structure and dielectric properties of Na1 − xKxNO2 solid solutions (x = 0, 0.05, 0.10) embedded in porous glass with an average pore diameter of 70 ± 10 A in the range 300–447 K, i.e., in the ferro-and paraelectric phases. The structural properties of the bulk and nanostructured materials are compared. It is shown that the introduction of small amounts of potassium brings about a noticeable change in the intensity ratio of the elastic Bragg peaks, while leaving the space group characterizing the structure of these nanocomposites unaffected. An increase in the potassium fraction does not result in a substantial decrease in the phase transition point. Measurements of the dielectric response have revealed that an increase in the potassium content gives rise to a marked “hardening” of the lattice in the premelting state, which reduces dielectric losses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d9b77fce7bd87a96a5ca4cbce0b6bd99 https://doi.org/10.1134/s1063783408080271 Zobrazit plný text záznamu Full text from SpringerLink