Skip to main content Accessibility help
×
Home

Microstructural and Electrical Properties of La Doped Ba1划xSrxTiO3 Thin Films For Tunable Microwave Device Applications

  • M.W. Cole (a1), P.C. Joshi (a1), E. Ngo (a1), C.W. Hubbard (a1), U. Lee (a1) and M.H. Ervin (a1)...

Abstract

We have investigated the structural, compositional, interfacial, surface morphological and dielectric properties of Ba0.6Sr0.4TiO3 solid solution thin films La doped from 0 to 10 mol%. The doped thin films were prepared by the metalorganic solution deposition technique using carboxylate-alkoxide precursors. After post-deposition annealing in oxygen ambient at 750 °C the films were characterized via x-ray diffraction, Auger electron microscopy, field emission scanning electron microscopy, and atomic force microscopy. The electrical measurements were achieved in the metal-insulator-metal (MIM) configuration with Pt as the top and bottom electrode. Our results demonstrated that La doping had a strong effect on the films microstructural, dielectric and insulating properties. Specifically, 1 mol% La doped BST films exhibited a lower dielectric constant, 283 and higher resistivity 31.4×1013 W-cm with respect to that of undoped BST. The loss tangent and tunability (at 100 kHz) of the 1 mol% La doped BST films were 0.019 and 21% (at E=300kV/cm) respectively.

Copyright

References

Hide All
1. Knauss, L.A., Pond, J.M., Horwitz, S.J., Chrisey, D.B., Appl. Phys. Lett., 69, 25 (1992).
2. Cole, M.W., Joshi, P.C., Ervin, M.H., Wood, M.C., Pfeffer, R.L., Thin Solid Films, 374, 34 (2000).
3. Joshi, P.C., Cole, M.W., Appl. Phys. Lett.,77, 289 (2000).
4. Patel, D. P., Radar Division, NavelResearch Laboratory, Washington DC, USA, private communication.
5. Xu, Y., Ferroelectric Materials and Their Applications, North Holland, New York, NY (1991)
6. Weston, U.N., J. Am. Ceramic Soc., 52, 253 (1969).
7. Varadan, V.K., Ghodgaonkar, D.K., Varadan, V.V., Microwave J., 30, 116 (1992).

Microstructural and Electrical Properties of La Doped Ba1划xSrxTiO3 Thin Films For Tunable Microwave Device Applications

  • M.W. Cole (a1), P.C. Joshi (a1), E. Ngo (a1), C.W. Hubbard (a1), U. Lee (a1) and M.H. Ervin (a1)...

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