Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17529
Title: Electrical properties of compositionally graded lead calcium titanate thin films
Authors: Tang, XG
Chan, HLW 
Ding, AL
Keywords: Ferroelectrics
Thin films
Dielectric resonance
Issue Date: 2003
Source: Solid state communications, 2003, v. 127, no. 9-10, p. 625-628 How to cite?
Journal: Solid State Communications 
Abstract: The compositional gradient (Pb1-xCax)TiO3 (PCT) thin films of x = 0 and 24 mol% were fabricated on Pt/Ti/SiO 2/Si substrates by using a modified sol-gel process. The final structure consists of two layers, up-graded films starting from PbTiO 3 on the Pt electrode to the top PCT(24) layer, whereas films with opposite gradient are called down-graded films. Highly (100)-oriented graded PCT thin films have been obtained when the graded PCT thin films were annealed at 600 °C. At 100 kHz, the dielectric constants were 79 and 128, respectively, for the up-graded and down-graded PCT films. The pyroelectric coefficient (p) of the graded films was measured by a dynamic technique. At room temperature, the values of p and figure-of-merits (FD) of the up-graded and down-graded PCT films are 95 μC/m2K and 9.1 × 10-6Pa-0.5, 112 μC/m2K and 8.6 × 10-6Pa-0.5, respectively.
URI: http://hdl.handle.net/10397/17529
ISSN: 0038-1098
DOI: 10.1016/S0038-1098(03)00562-3
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