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LaNiO3 and Cu3Ge contacts to YBa2Cu3O7-x films

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Abstract

Metallization of high-Tc superconductors using low resistivity metal oxides and Cu-Ge alloys has been investigated on high quality pulsed laser deposited epitaxial YBa2Cu3O7-x (YBCO) films. Epitaxial LaNiO3 (LNO) thin films have been grown on YBCO films at 700°C using pulsed laser deposition. The specific resistivity of LNO was measured to be 50 µΩ-cm at 300K which decreases to 19 µΩ-cm at 100K indicating good metallicity of the LNO films. The contact resistance of LNO-YBCO thin film interface was found to be reasonably low (of the order of 10-4Ω-cm2 at 77K) which suggests that the interface formed between the two films is quite clean and LNO can emerge as a promising metal electrode-material to YBCO films. A preliminary investigation related to the compatibility of Cu3Ge alloy as a contact metallization material to YBCO films is discussed. The usage of other oxide based low resistivity materials such as SrRuO3 (SRO) and SrVO3 (SVO) for metallization of high-Tc YBCO superconductor films is also discussed.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, North Carolina State University, 27695-7916, Raleigh, NC

    D. Kumar, R. D. Vispute, O. Aboelfotoh, S. Oktyabrsky, K. Jagannadham & J. Narayan

  2. Tata Institute of Fundamental Research, Bombay, India

    P. R. Apte & R. Pinto

Authors
  1. D. Kumar
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  2. R. D. Vispute
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  3. O. Aboelfotoh
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  4. S. Oktyabrsky
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  5. K. Jagannadham
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  6. J. Narayan
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  7. P. R. Apte
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  8. R. Pinto
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Kumar, D., Vispute, R.D., Aboelfotoh, O. et al. LaNiO3 and Cu3Ge contacts to YBa2Cu3O7-x films. J. Electron. Mater. 25, 1760–1766 (1996). https://doi.org/10.1007/s11664-996-0032-1

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  • DOI: https://doi.org/10.1007/s11664-996-0032-1

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