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The properties of thin film 0.5Ba (Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BCZTO)

BSc Thesis Project

Available immediately (2019), physical and materials background is rather preferred.

Project motivation:

Although nowadays Pb(Zr1-xTix)O3 (PZT) is still in large quality application, the modern society is urgently demanding the lead free. BCZTO has been considered as a very promising commercial candidate due to its remarkable ferroelectricity and dielectricity. In this project, the target is manufacturing the epitaxy BCZTO thin film on various substrate, characterisation its properties. The observation of BCZTO micro-structure changing against substrate mechanical strain will show the concealed path. A path that how to improve the dense epitaxy BCZTO thin film properties up to the bulk level, or even better.

Project goal:

BCZTO is a sort of solid solution which has been proved very difficult to grow a dense thin film on the substrates. By using Pulsed Laser Deposition (PLD), a series of smooth epitaxy BCZTO films are expected. Afterwards, domain structures are able to be observed by X-ray diffraction (XRD). The lattice parameters are required to further understanding of the BCZTO phase at a certain strain level. Atomic Force Microscopy (AFM) will be applied to check the topography.

Successful candidates can become co-author of a peer-reviewed publication.

Sizhao Huang, CR 3221,
Prof. Gertjan Koster, CR 3247,
Inorganic Materials Science Group

Reference for further interests:

  1. Acosta, M., et al. Applied Physics Reviews 4.4 (2017): 041305.
  2. Silva, José PB, et al. ACS applied materials & interfaces 10.17 (2018): 15240-15249.