材料期刊网

Lead zirconate titanate (PZT) thin films were coated on Pt/Ti/SiO(2)/Si substrates by a sol-gel method and then crystallized at 490 degrees C using the magnetic field of 2.45GHz microwave irradiation. The crystalline phases and microstructures as well as the electrical properties of the PZT thin films were investigated. X-ray diffraction analysis indicated that the films were crystallized well into the perovskite phase. Scanning electron microscopy showed that the PZT films had a typical rosette structure, which consisted of large round grains on a matrix of fine grains. A transmission electron microscopy (TEM) study revealed that the fine grains were also mainly crystallized into the perovskite phase. The average remanent polarization and coercive field of the PZT films were approximately 21 mu C/cm(2) and 92 kV/cm, respectively, whereas the dielectric constant and loss value measured at 1 kHz were approximately 510 and 0.07, respectively. (C) 2009 The Japan Society of Applied Physics