Ferroelectric and phase transition studies in cesium nitrate: poly(vinyl alcohol) composite films

Autor:	R. Nath, Nagendra Prasad Pathak, Koppole C. Sekhar, Arvind Nautiyal
Rok vydání:	2009
Předmět:	Permittivity Vinyl alcohol Materials science Scanning electron microscope Transition temperature Composite number Analytical chemistry General Chemistry Dielectric Ferroelectricity Field emission microscopy chemistry.chemical_compound chemistry General Materials Science
Zdroj:	Applied Physics A. 97:205-210
ISSN:	1432-0630 0947-8396
DOI:	10.1007/s00339-009-5165-7
Popis:	The composite films of cesium nitrate (CsNO3) and poly(vinyl alcohol) (PVA) with varying composition were prepared using the solvent cast method. The hysteresis loop characteristics show optimum remnant polarization (P r ) of 2.75 μC/cm2 at 50 wt.% composition. The field emission scanning electron microscope images show a nearly homogeneous distribution of CsNO3 grains in the 50 wt.% composite film. The temperature dependence of the remnant polarization shows a diffused transition temperature range from the ferroelectric to the paraelectric phase and this has been attributed to the reduced enthalpy. The butterfly features of the dielectric constant–voltage (e–V) characteristics have been attributed to polarization switching.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3707f00e6675024e9f7b1e3e7bcc4951 https://doi.org/10.1007/s00339-009-5165-7 Zobrazit plný text záznamu Plný text ve formátu PDF