Combinatorial fabrication and characterization of ternary la 2O3-Mn2O3-Co3O 4 composition spreads

Dmitry Anatolyevich Kukuruznyak, Parhat Ahmet, Atsushi Yamamoto, Fumio Ohuchi, Toyohiro Chikyow

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We describe the screening of large combinatorial oxide libraries for determining their electric transport characteristics. Complete full ternary composition spreads of La2O3-Mn2O 3-Co3O4 oxide alloys were deposited onto single conducting Nb-doped SrTiO3 substrates by the pulsed laser deposition technique incorporating a moving shutter and a rotating substrate holder. The electrical resistance of the spreads was determined using a custom-designed scanning conducting probe. We found that a single electrically conducting area in the ternary spread develops into two branches to LaMnO3 perovskites close to the ideal LaMnO3 stoichiometry and to a wide La0.65Co0.35Ox-La0.20Co 0.80Ox system with perovskite-related structures. We also discovered that compositions along the tie line [La0.20Co 0.65Mn0.15OX-La0.57Co 0.20Mn0.23OX] exhibit the weakest temperature dependence and therefore could be used in fabricating of stable thin film resistors and gas sensors.

Original languageEnglish
Pages (from-to)6164-6166
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume44
Issue number8
DOIs
Publication statusPublished - 2005 Aug 5
Externally publishedYes

Keywords

  • Combinatorial screening
  • Composition spread
  • Lanthanum cobaltite
  • Lanthanum manganite
  • Refractory resistor
  • Scanning probe
  • Sensor

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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