Atomic collision effects during PLD processes: Nonstoichiometry control in transparent superconductors

Taro Hitosugi, D. Packwood, S. Shiraki

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    The pulsed laser deposition (PLD) growth processes of spinel lithium titanates, Li4Ti5O12 and LiTi2O 4, on MgAl2O4 (111) substrates are investigated. Although a Li4Ti5O12 target was used for the depositions, the Li/Ti atomic ratio of the species arriving at the substrate during deposition was only ∼0.5, enabling high quality LiTi 2O4 films to be prepared with a rocking curve full-width at half-maximum of ∼0.05°. The LiTi2O4 epitaxial thin films exhibited high conductivity at room temperature (∼3.0 × 103 Ω-1cm-1) and a superconducting transition temperature of ∼13.3 K. These values are the highest recorded for epitaxial thin films. Moreover, the effect of collisions between the atoms in a plume were studied quantitatively. These results demonstrate the importance of the target composition, providing further insight into Licontaining metal-oxide deposition processes using PLD.

    Original languageEnglish
    Title of host publicationOxide-Based Materials and Devices V
    PublisherSPIE
    ISBN (Print)9780819499004
    DOIs
    Publication statusPublished - 2014
    Event5th Annual Oxide Based Materials and Devices Conference - San Francisco, CA, United States
    Duration: 2014 Feb 22014 Feb 5

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume8987
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Other

    Other5th Annual Oxide Based Materials and Devices Conference
    CountryUnited States
    CitySan Francisco, CA
    Period14/2/214/2/5

    Keywords

    • Collision
    • Growth process
    • Pulsed laser deposition (PLD) transparent superconductor
    • Spinel
    • Stochastic process

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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