Seong Jun Kang and Yung Sup Yoon

School of Electrical and Computer Engineering, Inha University, Inchon 402-751, Korea

La-modified PbTiO₃ [(Pb,La)TiO₃] thin film can be utilized in many electronic devices because it allows a wide range of ferroelectric properties depending on the La concentration, (Pb,La)TiO₃ thin films have been investigated by many research groups; however, fatigue and ferroelectric properties of (Pb,La)TiO₃ thin films with various La concentrations have been rarely studied, although they are essential to selecting the right composition of (Pb,La)TiO₃ thin film in device applications. In this study, we have investigated the fatigue and ferroelectric properties of PLT thin films with varying the La concentration from 5 to 29 mol%.