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Effect of W Substitution in Strontium Bismuth Tantalate Ferroelectric Ceramics: Enhanced Ferroelectric Properties

  • Indrani Coondoo (a1), Neearj Panwar (a2), Ashok Biradar (a3) and Arun Jha (a4)

Abstract

Tungsten (W)-substituted SBT ceramics [SrBi2(Ta1-xWx)2O9; 0.0 ≤ x ≤ 0.20] were synthesized by solid state reaction method using different sintering temperatures (1100 οC, 1150 οC, 1200 οC and 1250 οC). W substitution is found to significantly affect the electrical properties of SBT, including dielectric permittivity, Curie temperature, and ferroelectricity. Dielectric constant (εr ) and the Curie temperature (Tc) increase with increasing W content. The dielectric loss reduces significantly with increase in W concentration. The maximum Tc of ~ 390 οC is observed in the sample with x = 0.20 as compared to ~ 320 οC for the pure sample when sintered at 1200 οC. The peak ε increases from ~ 270 in the sample with x = 0.0 to ~ 700 for the composition with x = 0.20, when sintered at 1200 οC. All the tungsten-substituted ceramics have higher 2Pr than that in the pristine sample. The maximum 2Pr (~25 μC/cm2) is obtained in composition with x = 0.05 sintered at 1200 οC. These effects have been interpreted based on the model of the recovery of oxygen vacancies upon W substitution. Such compositions with low loss and high Pr values should be excellent materials for highly stable ferroelectric memory devices.

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1 Araujo, C. A. P. de, Cuchiaro, J. D. McMillan, L. D. Scott, M. C. and Scott, J. F. Nature 374, 627 (1995).10.1038/374627a0
2 Subbarao, E. C. Integr. Ferr. 12, 33 (1996).10.1080/10584589608225746
3 Wu, Y. Nguyen, C. Seraji, S. Forbess, M. J. Limmer, S. J. Chou, T. and Cao, G. Z. J. Amer. Ceram. Soc. 84, 2882 (2001).
4 Martin, P. D. Castro, A. Millan, P. and Jimenez, B. J. Mater. Res. 13, 2565 (1998).10.1557/JMR.1998.0358
5 Noguchi, Y. Miyayama, M. and Kudo, T. Phys. Rev. B 63, 214102 (2001).
6 Coondoo, I. Jha, A K and Agarwal, S K, J. Eur. Ceram. Soc. 27, 253 (2007).10.1016/j.jeurceramsoc.2006.04.167
7 Martirena, H. T. and Burfoot, J. C. J. Phys. C: Solid State Phys. 7, 3182 (1974).10.1088/0022-3719/7/17/024
8 Noguchi, Y. Miyayama, M. and Kudo, T. J. Appl. Phys. 88, 2146 (2000).10.1063/1.1305547
9 Singh, K. Bopardik, D. K. and Atkare, D. V. Ferroelectrics 82, 55 (1988).10.1080/00150198808201337
10 Watanabe, H. Mihara, T. Yoshimori, H. and Araujo, C. A. P. de, Jpn. J. Appl. Phys. 34, 5240 (1995).10.1143/JJAP.34.5240
11 Atsuki, T. Soyama, N. Yonezawa, T. and Ogi, K. Jpn. J. Appl. Phys. 34, 5096 (1995).
12 Friessnegg, T. Aggarwal, S. Ramesh, R. Nielsen, B. Poindexter, E. H. and Keeble, D. H. Appl. Phys. Lett. 77, 127 (2000).
13 Xu, Y. H. Ferroelectric Materials (Elsevier Science Publishers, Amsterdam, 1991).
14 Coondoo, I. Panwar, N. and Jha, A. K. J. Am. Ceram. Soc. (Communicated, 2010).
15 Watanabe, H. Mihara, T. Yoshimori, H. and Araujo, C. A. P. de, Jpn. J. Appl. Phys. 34, 5240 (1995).
16 Miyayama, M. Nagamoto, T. and Omoto, O. Thin Sol. Films 300, 299 (1997).
17 Xu, Y. H. Ferroelectric Materials (Elsevier Science Publishers, Amsterdam, 1991)
18 Das, R. R. Bhattacharya, P. Perez, W. and Katiyar, R. S. Ceram. Int. 30, 1175 (2004).
19 Desu, S. B. Joshi, P. C. Zhang, X. and Ryu, S. O. Appl. Phys. Lett. 71, 1041 (1997).10.1063/1.119721

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Effect of W Substitution in Strontium Bismuth Tantalate Ferroelectric Ceramics: Enhanced Ferroelectric Properties

  • Indrani Coondoo (a1), Neearj Panwar (a2), Ashok Biradar (a3) and Arun Jha (a4)

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