Atomically flat surface: The key issue for solution-derived epitaxial multilayers

Mariona Coll, Alberto Pomar, Teresa Puig, Xavier Obradors

    Research output: Contribution to journalArticleResearchpeer-review

    23 Citations (Scopus)

    Abstract

    We present a general methodology to study the morphology of complex thin film surfaces by evaluating the percentage of flat area through the use of atomic force microscopy. We prove that this is the key parameter to assess the suitability of a layer and ensure the desired epitaxy of the subsequent layer In a heterostructure. The method has been verified by applying it to chemically deposited YBa2Cu3O7 (YBCO) superconducting films grown on buffer layers with different surface morphologies. We demonstrate that, indeed, YBCO self-field critical current density is controlled by the buffer layer flat area fraction. © 2008 The Japan Society of Applied Physics.
    Original languageEnglish
    Pages (from-to)1217011-1217013
    JournalApplied Physics Express
    Volume1
    Issue number12
    DOIs
    Publication statusPublished - 1 Jan 2008

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