Hydrothermal BaTiO3 thin films from nanostructured Ti templates

Hasan Akyildiz, Michelle D. Casper, Seymen M. Aygün, Peter G. Lam, Jon-Paul Maria

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Polycrystalline BaTiO3 thin films have been prepared by hydrothermal reaction with sputter-deposited nanostructured reactive Ti templates designed to control net diffusion direction and distance. Templates were prepared in two morphologies, i.e., planar and nanopillar. The samples produced from flat templates showed sluggish transformation kinetics and an eventual termination of reaction without fully consuming the Ti metal. Templates with pillar morphology, on the other hand, could be transformed to phase-pure BaTiO3, independent of the template thickness. In the as-precipitated state, those films revealed a permittivity of ∼1000 and loss tangent values around 0.1 with mild dispersion in the kilohertz frequency range. Annealing these films under forming gas containing 1 vol% H2 balance N 2 for 3 h at 200 °C decreased high-field losses to 0.06 and reduced dispersion. Mn incorporation as an in situ acceptor dopant was also explored. Addition of Mn during hydrothermal treatment further improved the electrical properties. Annealing under the same postgrowth conditions virtually eliminated the frequency dispersion in the range of 1 kHz to 1 MHz, while maintaining permittivity values in the range of 350.

Original languageEnglish (US)
Pages (from-to)592-599
Number of pages8
JournalJournal of Materials Research
Volume26
Issue number4
DOIs
StatePublished - Feb 28 2011

Fingerprint

templates
Thin films
Permittivity
thin films
Annealing
permittivity
Electric properties
Gases
Metals
Doping (additives)
annealing
Kinetics
tangents
frequency ranges
electrical properties
kinetics
gases
metals
Direction compound

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics

Cite this

Akyildiz, Hasan ; Casper, Michelle D. ; Aygün, Seymen M. ; Lam, Peter G. ; Maria, Jon-Paul. / Hydrothermal BaTiO3 thin films from nanostructured Ti templates. In: Journal of Materials Research. 2011 ; Vol. 26, No. 4. pp. 592-599.
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Hydrothermal BaTiO3 thin films from nanostructured Ti templates. / Akyildiz, Hasan; Casper, Michelle D.; Aygün, Seymen M.; Lam, Peter G.; Maria, Jon-Paul.

In: Journal of Materials Research, Vol. 26, No. 4, 28.02.2011, p. 592-599.

Research output: Contribution to journalArticle

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