Effect of Cr additions on the electrical properties of Ni-BaTiO3 ultra-thin multilayer capacitors

Anton V. Polotai, Tae Hee Jeong, Gai Ying Yang, Elizabeth C. Dickey, Clive A. Randall, Pascal Pinceloup, Abhijit S. Gurav

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Multilayer ceramic capacitors based on BaTiO3 dielectric compositions and Ni inner electrodes have complex interfacial reactions that impact the continuity of the inner electrode microstructure. Previously we demonstrated that through the addition of Cr to Ni, a significant improvement in the continuity of ultra-thin Ni electrodes in Ni-BaTiO3 multilayer capacitors could be achieved. Here, the effect of the Cr addition to the nickel electrode pastes is studied with regard to the electrical properties. Low-field electrical measurements demonstrate no major differences between Cr doped Ni and undoped Ni. However, high-field measurements show a significant decrease to the total capacitor resistance. Under a critical electrical bias the conductivity significantly increases due to a Fowler-Nordheim tunneling conduction though the interfacial Schottky barrier at the dielectric-electrode interface; the onset voltage of this conduction is much lower than with the undoped nickel. Based on these results, we evaluate criteria for the selection of an appropriate refractory metal in order to improve the Ni electrode continuity.

Original languageEnglish (US)
Pages (from-to)6-12
Number of pages7
JournalJournal of Electroceramics
Issue number1
StatePublished - Aug 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering


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