Synthesis and properties of superconducting lanthanum sulfide films

A. D. Kent, B. Oh, T. H. Geballe, A. F. Marshall

    Research output: Contribution to journalArticle

    Abstract

    We report the structural and transport properties of La-S films prepared by reactive planar magnetron sputtering. The La-S (Th3P4 cubic structure) can be prepared over a range of compositions with the electronic properties varying from a low electron density superconductor (Tc≈ 7 K) to a semiconductor which shows thermally activated transport at low temperature. This method of deposition produces small grained (≈ 200 Å) polycrystalline films whose composition can be varied continuously by tuning the deposition parameters. We discuss the TEM and X-ray data as well as the resistivity, Hall effect and superconducting properties of these films. We find that the superconducting transition temperature of the films is the same as that of bulk single crystals; however the mobility is a factor of 2 to 300 lower than that found in bulk specimens.

    Original languageEnglish (US)
    Pages (from-to)57-62
    Number of pages6
    JournalMaterials Letters
    Volume5
    Issue number3
    DOIs
    StatePublished - Feb 1987

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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