Authors: Pham Duc Thang; Mai Thi Ngoc Pham
Addresses: Laboratory for Micro and Nanotechnology, Faculty of Engineering Physics and Nanotechnology, University of Engineering and Technology, Vietnam National University, Hanoi, Building E3, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam ' Faculty of Chemistry, University of Natural Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam
Abstract: Ferroelectric ceramics are widely used in a variety of applications, ranging from high dielectric capacitors, mechanical actuators, micro-transducers to memory devices. Here we present chemical and physical processes to obtain nanocomposites based on ferroelectric perovskites, from metal-oxide to dual-phase oxide materials. The changes in the structural, dielectric and magnetic properties are studied. Interesting observations such as the percolation effect and anomaly in temperature dependence of magnetisation are also mentioned. The results are discussed in view of effects of the spatial distribution of each phase, the stress-induced structural phase transition and the ferroelectric-magnetic coupling. Additionally, recent results on epitaxial growth of PZT film on Si are presented.
Keywords: PZT ferroelectrics; nanocomposites; high-k dielectric; ferroelectric-magnetic coupling; nanotechnology; ferroelectric ceramics; ferroelectric perovskites; dielectric properties; magnetic properties; structural properties; percolation effect; temperature; magnetisation.
International Journal of Nanotechnology, 2013 Vol.10 No.3/4, pp.363 - 371
Published online: 05 Apr 2013 *Full-text access for editors Access for subscribers Purchase this article Comment on this article