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Electrical and Pyroelectric Properties of Highly (001)‐Oriented (Pb 0.76 Ca 0.24 )TiO 3 Thin Films Grown by a Sol–Gel Process
Author(s) -
Tang XinGui,
Chan Helen LaiWah
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.01588.x
Subject(s) - materials science , dielectric , pyroelectricity , coercivity , figure of merit , thin film , analytical chemistry (journal) , hysteresis , polarization (electrochemistry) , sol gel , dielectric loss , electric field , ferroelectricity , optoelectronics , condensed matter physics , nanotechnology , chemistry , physics , chromatography , quantum mechanics
Highly (001)‐oriented (Pb 0.76 Ca 0.24 )TiO 3 (PCT) thin films were grown on Pt/Ti/SiO 2 /Si substrates using a sol–gel process. The PCT film with a highly (001) orientation showed well‐saturated hysteresis loops at an applied field of 800 kV/cm, with remanent polarization ( P r ) and coercive electric field ( E c ) values of 23.6 μC/cm 2 and 225 kV/cm, respectively. At 100 kHz, the dielectric constant and dielectric loss values of these films were 117 and 0.010, respectively. The leakage‐current density of the PCT film was 6.15 × 10 −8 A/cm 2 at 5 V. The pyroelectric coefficient ( p ) of the PCT film was measured using a dynamic technique. At room temperature, the p values and figures‐of‐merit ( F D ) of the PCT film were 185 μC/m 2 K and 1.79 × 10 −5 Pa −0.5 , respectively.