Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-29T07:40:12.767Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of the Oxygen Partial Pressure on the Microstructure and Properties of Barium Strontium Titanate Thin Films Synthesized by Pulsed Laser Deposition

Published online by Cambridge University Press:  10 February 2011

C.G. Fountzoulas ,
C. W. Hubbard ,
Eric H. Ngo ,
J. D. Kleinmeyer ,
J. D. Demaree ,
P. C. Joshi  and
M. W. Cole
C.G. Fountzoulas
Affiliation:
Army Research Laboratory, Weapons Materials Directorate, APG, MD, 21005-5069
C. W. Hubbard
Affiliation:
Army Research Laboratory, Weapons Materials Directorate, APG, MD, 21005-5069
Eric H. Ngo
Affiliation:
Army Research Laboratory, Weapons Materials Directorate, APG, MD, 21005-5069
J. D. Kleinmeyer
Affiliation:
Army Research Laboratory, Weapons Materials Directorate, APG, MD, 21005-5069
J. D. Demaree
Affiliation:
Army Research Laboratory, Weapons Materials Directorate, APG, MD, 21005-5069
P. C. Joshi
Affiliation:
Army Research Laboratory, Weapons Materials Directorate, APG, MD, 21005-5069
M. W. Cole
Affiliation:
Army Research Laboratory, Weapons Materials Directorate, APG, MD, 21005-5069
Get access

Abstract

Barium strontium titanate (BSTO) films were synthesized by the pulsed laser deposition technique (PLD) on silicon substrates at room temperature. The BSTO film synthesis took place at constant laser energy, 500 mJ, and partial oxygen pressure of 3, 15, 30, 45, 100 mTorr. All films were post annealed at 750 °C in a tube furnace in an oxygen atmosphere. The microstructure, crystallinity and lattice constant of the BSTO films were studied with the aid of scanning electron microscopy (SEM), photon tunneling microscopy (PTM) and Glancing Angle X-ray Diffraction analysis (GAXRD). The hardness and modulus of elasticity of the films were studied with the aid of a nanohardness indenter. The film stoichiometry was determined with the aid of Rutherford Back Scattering (RBS). The results of this research will be combined with the results of our previous work [1] on the effect of substrate temperature on the microstructure and mechanical properties of the BSTO films in order to construct a structural zone model (SZM) of the BSTO films synthesized by PLD.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 603: Symposium KK – Materials Issues for Tunable RF & Microwave Devices , 1999 , 157
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. "Mechanical Properties of Ferroelectric Composite Thin Films", C. G. Fountzoulas* and Somnath Sengupta, Thin Films-Stresses and Mechanical Properties VII, MRS Vol. 505 (1998)10.1557/PROC-505-337Google Scholar
2. Movchan, B. A. and Demchishin, S. V., Phys. Met. Metallogr., 28, 653 (1969).Google Scholar
3. Thornton, J. A., Annual. Rev. Mater. Sci., 7, 239 (1977).10.1146/annurev.ms.07.080177.001323Google Scholar
4. Fountzoulas, C. and Nowak, W. B., J. Vac. Sci. Technol. A 9 (4), 2128 (Jul/Aug 1991).10.1116/1.577238Google Scholar
5. Sengupta, S., Sengupta, L. C., Vijay, D. P. and Desu, S. B., J. of Integrated Ferroelctrics,13, 239–245 (1996).10.1080/10584589608012319Google Scholar
6. Brennan, C. J., Integrated Ferroelectrics, 2, 73 (1992).10.1080/10584589208215733Google Scholar
7. Lee, J., Ramesh, R. and Keramidas, V. G., MRS Symposium Proceedings, 361, 67 (1195).10.1557/PROC-361-67Google Scholar
8. Mullins, W. W., J. Appl. Phys., 28, 333 (1957)10.1063/1.1722742Google Scholar
9. Sengupta, S., Sengupta, L. C., Demaree, J. D., and Kosik, W., Technical report, ARL-TR-654 (1994).Google Scholar
10. Baumert, B. A., Chang, L. H., Matsuda, A. T., Tsai, T. L., Tracy, C. J., Taylor, D. J., Otsuki, T., Fujii, E, Hayashi, a. and Suu, K., J. Appl. Phys., 82, (5), 3558–3565 (1997)10.1063/1.366066Google Scholar