Skip to main content Accessibility help
×
Home

Dielectric Properties of Pulsed Excimer Laser Ablated BaBi2Nb2O9 Thin Films

  • Apurba Laha (a1), S. B. Krupanidhi (a1) and S. Saha (a2)

Abstract

The dielectric response of BaBi2Nb2O9 (BBN) thin films has been studied as a function of frequency over a wide range of temperatures. Both dielectric constant and loss tangent of BBN thin films showed a ‘power law’ dependence with frequency, which was analyzed using the Jonscher's universal dielectric response model. Theoretical fits were utilized to compare the experimental results and also to estimate the value of temperature dependence parameters such as n(T) and a(T) used in the Jonscher's model. The room temperature dielectric constant (ε') of the BBN thin films was 214 with a loss tangent (tanδ) of 0.04 at a frequency of 100 kHz. The films exhibited the second order dielectric phase transition from ferroelectric to paraelectric state at a temperature of 220 °C. The nature of phase transition was confirmed from the temperature dependence of dielectric constant and sponteneous polarization,respectively. The calculated Currie constant for BBN thin films was 4 × 105°C.

Copyright

References

Hide All
1. De Araujo, C. A. Paz., Cuchiaro, J. D., Scott, M. C., McMillan, L. D., and Scott, J. F., Nature (London) 374, 627 (1995).
2. Paz de Araujo, C. A., McMillan, L. D., Melnick, B. M., Cuchiaro, J. D., and Scott, J. F., Ferroelectrics, 104, 241 (1990).
3. Otsuki, T. and Arita, K., Integr. Ferroelectr., 17, 31 (1997).
4. Song, T. K., Lee, J. -K., and Jung, H. J., Appl. Phys. Lett., 69, 3839 (1996).
5. Bhattacharyya, S., Bharadwaja, S. S. N., and Krupanidhi, S. B., Appl. Phys. Lett. 75, 2656 (1999).
6. Desu, S. B. and Li, T., Mat. Sci. Eng., B34, L4 (1995).
7. Lu, C. H. and Wen, C. Y., J. Appl. Phys. 86, 6335 (1999).
8. Laha, A. and Krupanidhi, S. B., Appl. Phys. Lett. 77, 3818 (2000).
9. Warren, W. L., Dimos, D., Tuttle, B. A., Nasby, R. D., and Pike, D. E., Appl. Phys. Lett. 65, 1018 (1994).
10. Mihara, T., Yoshimori, H., Watanabe, H., and Paz de Araujo, C. A., Jpn. J. Appl. Phys., 34, 5233 (1995).
11. Subbarao, E. C., Phys. Chem. Solids, 23, 665 (1962).
12. Jonscher, A. K., Dielectric Relaxation in Solids, Chelsea Dielectrics Press, London (1983).

Dielectric Properties of Pulsed Excimer Laser Ablated BaBi2Nb2O9 Thin Films

  • Apurba Laha (a1), S. B. Krupanidhi (a1) and S. Saha (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed