Effect of Composition on Ferroelectric Response of Bi4-xSmxTi3O12 Thin Films

Autor:	Maharaj S. Tomar, R. E. Melgarejo, Sandra Dussan, Ram S. Katiyar
Rok vydání:	2005
Předmět:	Spin coating Materials science biology Bismuth titanate Analytical chemistry Substrate (electronics) biology.organism_classification Ferroelectricity Aurivillius Crystallography chemistry.chemical_compound chemistry Thin film Sol-gel Solid solution
Zdroj:	MRS Proceedings. 902
ISSN:	1946-4274 0272-9172
Popis:	Bismuth titanate (Bi4Ti3O12) is an electroceramic within the Aurivillius phase material with week ferroelectric memory. However, the partial substitution of Bi ion by a trivalent rare earth resulted in improved ferroelectric polarization. We synthesized Bi4-xSmxTi3O12 by a solution chemistry route and thin films were deposited by spin coating on Pt (Pt/TiO2/SiO2/Si) substrate. X-ray diffraction studies of the films showed a stoichiometric solid solution for the composition x ≤0.85. The films showed fatigue free ferroelectric polarization (Pr = 19.8 µC/cm2) for the composition x = 0.70. The films showed low leakage current at room temperature, showing the possibility of lead free ferroelectric devices.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::200ec39cff4495c5b490204e200fab01 https://doi.org/10.1557/proc-0902-t03-54 Zobrazit plný text záznamu Full text from SpringerLink