Effect of Ba Substitution on the Microstructure and Electrical Conductivity of Ba<I><SUB>x</SUB></I>Ca<SUB>1−<I>x</I></SUB>RuO<SUB>3</SUB> Thin Films Prepared by Laser Ablation

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  • Ito Akihiko
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Masumoto Hiroshi
    Center for Interdisciplinary Research, Tohoku University
  • Goto Takashi
    Institute for Materials Research, Tohoku University

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Other Title
  • Effect of Ba substitution on the microstructure and electrical conductivity of Ba[x]Ca1-xRuO3 thin films prepared by laser ablation
  • Effect of Ba Substitution on the Microstructure and Electrical Conductivity of Ba<I><SUB>x</SUB></I>Ca<SUB>1&minus;<I>x</I></SUB>RuO<SUB>3</SUB> Thin Films Prepared by Laser Ablation

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Abstract

BaxCa1−xRuO3 (BCRO) thin films were prepared by laser ablation on quartz substrates at a substrate temperature (Tsub) of 973 K and an oxygen pressure (PO<SUB>2</SUB>) of 13 Pa. The effect of Ba substitution on the microstructure and electrical conductivity (σ) was investigated. Rectangular-shaped CaRuO3 (CRO) island grains grew in BCRO thin films at a Ba fraction (x) below 0.1. BCRO thin films prepared at x>0.2 consisted of fine grains. BCRO thin films at x>0.2 showed metallic conduction, whereas those with an island structure at x<0.1 showed semi-conducting behavior. The σ increased from 2.5×103 S·m−1 to 3.8×104 S·m−1 with increasing x from 0.1 to 1.0.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 49 (8), 1822-1825, 2008

    The Japan Institute of Metals and Materials

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