Electrophysical properties of lead zirconate titanate films doped with lanthanum

Electrophysical properties of lead zirconate titanate films doped with lanthanum The influence of lanthanum doping of lead zirconate titanate films (PZTL) on their polarization properties and leakage currents is studied. The films of Pb1 − x La x (Zr0.48Ti0.52)1 − x/4O3 with x = 0, 0.02, 0.05, 0.08, and 0.1 and a thickness of 240 nm were produced using the sol-gel method at an annealing temperature of 650°C on the substrates with a Si-SiO2-TiO2-Pt structure. It is found that the residual polarization and the coercive field are weakened after doping with La. The films with x = 0.02 exhibit satisfactory ferroelectric characteristics (7 μC/cm2, 25 kV/cm) that make them suitable for use in ferroelectric memory. The current-voltage curves of PZTL films have two characteristic regions. In weak fields (up to 80–90 kV/cm), the leakage current is attributable primarily to the high resistance of the depletion region of the reverse-biased Schottky barrier at the electrode-ferroelectric interface, and the leakage current is thus practically independent of the La content. When the threshold voltage is exceeded, the Schottky barrier breakdown occurs, and the leakage current in strong fields is defined by the density of free carriers in the bulk of the film. This density depends on the La doping level. The leakage current at x = 0.02 is reduced by about two orders of magnitude compared to undoped PZT film. Further increases in the La content are accompanied by an increase in the leakage current in strong fields. This effect is attributed to a change in the conduction type and an increase in the density of n-type carriers. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Microelectronics Springer Journals

Electrophysical properties of lead zirconate titanate films doped with lanthanum

Loading next page...
Pleiades Publishing
Copyright © 2014 by Pleiades Publishing, Ltd.
Engineering; Electrical Engineering
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial