Gadolinium-substituted Bi4Ti3O12 (i.e. Bi4−xGdxTi3O12) were synthesized by sol-gel process for different compositions, and thin films were deposited on Pt (Pt/TiO2/SiO2/Si) substrate by spin coating. Post annealed films at 700° C were investigated for their structural properties using x-ray diffraction and Raman spectroscopy indicating solid solution for compositions: x = 0.00, 0.46, 0.56, and 0.85 where Bi ion is replaced by Gd-ion. Sol-gel derived Pt/Bi4−xGdxTi3O12 film/Pt capacitor structure was tested for dielectric, ferroelectric, and leakage current responses. Films showed ferroelectricity with polarization, Pr = 22 µC/cm2 for composition: x = 0.46. Magnetic response of the powder sample for composition: x = 0.85 was tested using SQUID, which showed superparamagnetic at room temperature and magnetic at 5 K with magnetic coercivity (Hc) = 29 Oe and very small remanance (σr) = 5.4 × 10−4 emu/g.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
B. Aurivillus, Ark Kemi 1 463 (1949).
E. C. Subbarao, J. Phys, Chem. Solids 23, 665 (1962).
R. A. Armstrong and R. E. Newnham, Mater. Res. Bull. 7, 1025 (1972).
D. Damjancovic, Rep. Prog. Phys. 61, 1267 (1998).
R. L. Withers, J. G. Thompson, and A. D. Rae, J. Solid State Chem. 94, 404 (1991).
B. H. Park, B. S. Kang, S. D. Bu, T. W. Noh, J. Lee, and W. Jo, Nature (London) 401, 682 (1999).
M.S. Tomar, R. E. Melgarejo, A. Hidalgo, S. B. Mazumder, and R. S. Katiyar, Appl. Phys. Lett. 81, 341 (2003)
P. R. Graves, G. Hua, S. Myhra, and J. G. Thompson, J. Solid State Chem. 144, 112 (1995).
S. Kojima, R. Imaizumi, S. Hamazaki, and M. Takaahige, Jpn. J. Appl. Phys., Part 1 33, 5559 (1994).
M. Osada, M. Tada, M. Kakihama, T. Watanabe, and H. Funakubo, Jpn. J. Appl. Phys. Part 1, 40, 5572 (2001).
R. E. Melgarejo, M. S. Tomar, P. S. Dobal, and R. S. Katiyar, J. Mater. Res. 15, 1661 (2000).
S. Kojima and S. Shimada, Physica B 219, 617 (1996).
About this article
Cite this article
Maharaj, S.T., Ricardo, E.M., Singhal, R. et al. Studies of Bi4-xGdxTi3O12 Bifunctional Material. MRS Online Proceedings Library 888, 809 (2005). https://doi.org/10.1557/PROC-0888-V08-09