Electrical and Pyroelectric Properties of Sol-Gel Derived (Pb,
Ca)TiO3 Thin Films with Various Orientations
TANG Xin-Gui1, DING Ai-Li2, CHAN Helen Lai-Wah1
1Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
2Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
Electrical and Pyroelectric Properties of Sol-Gel Derived (Pb,
Ca)TiO3 Thin Films with Various Orientations
TANG Xin-Gui1;DING Ai-Li2;CHAN Helen Lai-Wah1
1Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
2Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
Abstract： (Pb0.76Ca0.24)TiO3 (PCT) thin films with various orientations were grown on Pt/Ti/SiO2/Si substrates by using a sol-gel process and by controlling the temperature of heat-treatment. The PCT thin films with (100) and random orientation showed well-saturated hysteresis loops at an applied field of 800 kV/cm, with remanent polarisation and coercive electric field of 23.6 μC/cm2 and 225kV/cm, 17.8 μC/cm2 and 195 kV/cm, respectively. For highly (100)- and random-oriented PCT films, the dielectric constant and dielectric loss values of these films are 121 and 0.016, 121 and 0.024 at 1 kHz, respectively. The pyroelectric coefficients p of the PCT thin films are measured by a dynamic technique. At room temperature, the p values and figures of merits of the highly (100)- and random-oriented PCT films are 185 μC/m2K and 1.79 xm 10-5Pa-0.5, 176μC/m2K and 1.39 x 10-5Pa-0.5, respectively.
TANG Xin-Gui;DING Ai-Li;CHAN Helen Lai-Wah. Electrical and Pyroelectric Properties of Sol-Gel Derived (Pb,
Ca)TiO3 Thin Films with Various Orientations[J]. 中国物理快报, 2003, 20(11): 2039-2041.
TANG Xin-Gui, DING Ai-Li, CHAN Helen Lai-Wah. Electrical and Pyroelectric Properties of Sol-Gel Derived (Pb,
Ca)TiO3 Thin Films with Various Orientations. Chin. Phys. Lett., 2003, 20(11): 2039-2041.
2003, Vol. 20 
