Effect of restricted geometry on structural phase transitions in KH2PO4 and NH4H2PO4 crystals

• Autorzy: Tarnavich V. , Korotkov L. , Karaeva O. , Naberezhnov A. , Rysiakiewicz-Pasek E.
• Języki publikacji: EN

Abstrakty

EN

The dielectric response of crystalline NH4H2PO4 and KH2PO4–SiO2 and NH4H2PO4–SiO2 composites prepared by embedding salts into porous glasses with the average pore diameter of 320 nm has been studied at the temperature range of 85–300 K. An increase of the structure phase transition temperatures in embedded salts has been observed, which is supposedly due to tensile deformations of embedded crystalline particles. The antiferroelectric phase transition in confined ADP particles becomes diffuse in the temperature region around 10 K.

Słowa kluczowe

EN

ferroelectrics; antiferroelectrics; composite material; porous glass; phase transition; dielectric permittivity

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2010
• Tom: Vol. 40, nr 2
• Strony: 305--309
• Opis fizyczny: Bibliogr. 6 poz.

Twórcy

autor

Tarnavich V.

autor

Korotkov L.

autor

Karaeva O.

autor

Naberezhnov A.

autor

Rysiakiewicz-Pasek E.

• Voronezh State Technical University, 394026, Voronezh, Russia

Bibliografia

• [1] KUMZEROV YU., VAKHRUSHEV S., Nanostructures within porous materials, [In] Encyclopedia of Nanoscience and Nanotechnology, [Ed.] H.S. Nalwa, American Scientific Publishers, Vol. 10, 2003, pp. 1–39.
• [2] NABEREZHNOV A., FOKIN A., KUMZEROV YU., SOTNIKOV A., VAKHRUSHEV S., DORNER B., Structure and properties of confined sodium nitrite, The European Physical Journal E: Soft Matter 12(Supplement 1), 2003, pp. 21–24.
• [3] COLLA E.V., FOKIN A.V., KUMZEROV YU.A., Ferroelectric properties of nanosize KDP particles, Solid State Communications 103(2), 1997, pp. 127–130.
• [4] LINES M.E., GLASS A.M., Principles and Applications of Ferroelectrics and Related Materials, Claredon, Oxford, 1977.
• [5] SHASKOLSKAJA M.P., Acoustic Crystals, M. Nauka, 1982, pp. 402–425 (in Russian).
• [6] ZOLOTUKHIN I.V., SPITSINA S.V., YANCHENKO L.I., KOROTKOV L.N., Preparation, structure and dielectric properties of fractale aggregates of KH2PO4, Fizika Tverdogo Tela 41(11), 1999, pp. 2059–2061 (in Russian).