Studies of Bi4-xGdxTi3O12 Bifunctional Material

MRS Online Proceedings Library volume 888, Article number: 809 (2005) Cite this article

Abstract

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.

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References

  1. 1.

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

    Google Scholar 

  2. 2.

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

    CAS  Article  Google Scholar 

  3. 3.

    R. A. Armstrong and R. E. Newnham, Mater. Res. Bull. 7, 1025 (1972).

    CAS  Article  Google Scholar 

  4. 4.

    D. Damjancovic, Rep. Prog. Phys. 61, 1267 (1998).

    Article  Google Scholar 

  5. 5.

    R. L. Withers, J. G. Thompson, and A. D. Rae, J. Solid State Chem. 94, 404 (1991).

    CAS  Article  Google Scholar 

  6. 6.

    B. H. Park, B. S. Kang, S. D. Bu, T. W. Noh, J. Lee, and W. Jo, Nature (London) 401, 682 (1999).

    CAS  Article  Google Scholar 

  7. 7.

    M.S. Tomar, R. E. Melgarejo, A. Hidalgo, S. B. Mazumder, and R. S. Katiyar, Appl. Phys. Lett. 81, 341 (2003)

    Article  Google Scholar 

  8. 8.

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

    Article  Google Scholar 

  9. 9.

    S. Kojima, R. Imaizumi, S. Hamazaki, and M. Takaahige, Jpn. J. Appl. Phys., Part 1 33, 5559 (1994).

    CAS  Article  Google Scholar 

  10. 10.

    M. Osada, M. Tada, M. Kakihama, T. Watanabe, and H. Funakubo, Jpn. J. Appl. Phys. Part 1, 40, 5572 (2001).

    CAS  Article  Google Scholar 

  11. 11.

    R. E. Melgarejo, M. S. Tomar, P. S. Dobal, and R. S. Katiyar, J. Mater. Res. 15, 1661 (2000).

    CAS  Article  Google Scholar 

  12. 12.

    S. Kojima and S. Shimada, Physica B 219, 617 (1996).

    Article  Google Scholar 

Download references

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Affiliations

  1. Physics and Geology Department, University of Texas, 78451-2999, Edinburg, TX, USA

    S. Tomar Maharaj, E. Melgarejo Ricardo & Raúl Singhal

  2. University of Puerto Rico, Mayaguez, USA

    S. Tomar Maharaj

  3. Physics Department, University of Puerto Rico, 00681-9016, Mayagüez, PR, USA

    M. Angelats Luis

  4. Physics Department, University of Puerto Rico, 00931-3343, San Juan, PR, USA

    S. Katiyar Ram

Authors
  1. S. Tomar Maharaj
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  2. E. Melgarejo Ricardo
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  3. Raúl Singhal
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  4. M. Angelats Luis
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  5. S. Katiyar Ram
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Correspondence to S. Tomar Maharaj.

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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

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