Effect of Composition on Ferroelectric Response of Bi4−xSmxTi3O12 Thin Films


Bismuth titanate (Bi4Ti3O12) is an electroceramic within the Aurivillius phase material with week ferroelectric memory. However, the partial substitution of Bi ion by a trivalent rare earth resulted in improved ferroelectric polarization. We synthesized Bi4−xSmxTi3O12 by a solution chemistry route and thin films were deposited by spin coating on Pt (Pt/TiO2/SiO2/Si) substrate. X-ray diffraction studies of the films showed a stoichiometric solid solution for the composition x ≤0.85. The films showed fatigue free ferroelectric polarization (Pr = 19.8 µC/cm2) for the composition x = 0.70. The films showed low leakage current at room temperature, showing the possibility of lead free ferroelectric devices.

This is a preview of subscription content, access via your institution.


  1. 1.

    B. Aurivillius, Ark Kemi 1 463 (1949).

    CAS  Google Scholar 

  2. 2.

    E. C. Subbarao, J. Phys Chem. Solids 23, 665 (1962).

    CAS  Article  Google Scholar 

  3. 3.

    U. Chon, H. M. Jang, M. G. King, and C.H. Chang, Phys Rev. Lett. 89, 0876011 (2002).

    Article  Google Scholar 

  4. 4.

    M. S. Tomar, R.E. Melgarejo, A. Hidalgo, S.B. Majumder, and R.S. Katiyar, Appl. Phys. Lett. 83, 341 (2003).

    CAS  Article  Google Scholar 

  5. 5.

    P. R. Graves, G. Hua, S. Myhra, and J. G. Thompson, J. Solid State Chem. 144, 112 (1995).

    Article  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to Sandra Dussan.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Dussan, S., Tomar, M.S., Melgarejo, R.E. et al. Effect of Composition on Ferroelectric Response of Bi4−xSmxTi3O12 Thin Films. MRS Online Proceedings Library 902, 354 (2005). https://doi.org/10.1557/PROC-0902-T03-54

Download citation