Statistical analyses of repolarisation current of a PZT film deposited on ITO electrode with different thermal treatments

• Published in: Philosophical magazine (Abingdon, England) England), 2010-04, Vol.90 (12), p.1575-1584
• Main Authors: Marino, Salvatore, Th. Ionescu, Andrei, Alexe-Ionescu, Anca-Luiza, Nicastro, Gaetano, Strangi, Giuseppe, Scaramuzza, Nicola
• Format: Article
• Language: English
• Subjects: Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Deposition; Dielectric thin films; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Electrodes; Electronics; Exact sciences and technology; ferroelectric properties; Indium tin oxide; Lead zirconate titanates; Liquid crystals; Molecular electronics, nanoelectronics; Physics; PZT film; repolarisation current; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Statistical analysis; Structure of solids and liquids; crystallography; thermal treatment
• ISSN: 1478-6435; 1478-6443; 1478-6433
• DOI: 10.1080/14786430903419091

In the vast application fields of lead zirconate titanate (PZT) thin films, of particular interest are the interaction effects occurring at the ferroelectric-substrate interface [E. Bruno, M.P. De Santo, M. Castriota, S. Marino, G. Strangi, E. Cazzanelli and N. Scaramuzza, J. Appl. Phys. 103 (2008) p.064103; S. Dunn and R.W. Whatmore, J. Eur. Ceram. Soc. 22 (2002) p.825]. Relevant for this purpose are polarity-sensitive liquid crystals (LC) cells and micro- and nanoelectronic applications [S. Marino, M. Castriota, G. Strangi, E. Cazzanelli and N. Scaramuzza, J. Appl. Phys. 102, selected for Virtual Journal of Nanoscale Science & Technology, 30 July 2007 (2007) p.013002]. The polarisation current was investigated of a PZT film (PbZr 0.47 Ti 0.53 O 3 ) obtained by sol-gel synthesis and deposited by spin coating on an indium tin oxide (ITO) electrode. The different behaviour exhibited by such a system when the support electrode was previously submitted to a thermal treatment was attributed to the change of the electrical properties of the ITO layer. In particular, a higher negative charge in the conductive band of the ITO electrode seems to be responsible for a higher order in the ferroelectric film.