High-resolution and energy-filtered transmission electron microscopy of YBa2Cu3O7-x/PrBa2Cu3 O7 superlattices

M. Varela, C. Ballesteros, W. Grogger, K. M. Krishnan, D. Arias, Z. Sefrioui, C. León, J. Santamaría

Publikation: Beitrag in einer Fachzeitschrift!!Conference articleForschungBegutachtung

Abstract

Structural disorder induced by epitaxial strain relaxation in c-axis oriented [YBa2Cu3O7-x n u.c/PrBa2Cu3O7 5 u.c.] superlattices on (100) SrTiO3 substrates has been analyzed by high-resolution and energy-filtered transmission electron microscopy. Epitaxial strain shows up in ultrathin YBCO layers with thickness below 4 unit cells. Strain relaxation takes place when layer thickness increases above this value. Microscopy observations for epitaxially strained superlattices show a good morphology of the layers, with sharp and flat interfaces. However, in relaxed samples rougher interfaces are observed, together with microdomains showing the c-axis parallel to the substrate plane which preserve the superlattice compositional profile. Such microdomains of c-parallel growth provide a path for reduced lattice mismatch, conforming a very efficient mechanism for strain relaxation.

Originalspracheenglisch
Seiten (von - bis)558-561
Seitenumfang4
FachzeitschriftJournal of Alloys and Compounds
Jahrgang323-324
DOIs
PublikationsstatusVeröffentlicht - 12 Jul 2001
Extern publiziertJa
Veranstaltung4th International Conference on f-Elements - Madrid, Spanien
Dauer: 17 Sep 200021 Sep 2000

Fingerprint

Strain relaxation
Superlattices
Transmission electron microscopy
Lattice mismatch
Substrates
Microscopic examination
barium copper yttrium oxide

Schlagwörter

    ASJC Scopus subject areas

    • !!Mechanics of Materials
    • !!Mechanical Engineering
    • !!Metals and Alloys
    • !!Materials Chemistry

    Dies zitieren

    High-resolution and energy-filtered transmission electron microscopy of YBa2Cu3O7-x/PrBa2Cu3 O7 superlattices. / Varela, M.; Ballesteros, C.; Grogger, W.; Krishnan, K. M.; Arias, D.; Sefrioui, Z.; León, C.; Santamaría, J.

    in: Journal of Alloys and Compounds, Jahrgang 323-324, 12.07.2001, S. 558-561.

    Publikation: Beitrag in einer Fachzeitschrift!!Conference articleForschungBegutachtung

    Varela, M. ; Ballesteros, C. ; Grogger, W. ; Krishnan, K. M. ; Arias, D. ; Sefrioui, Z. ; León, C. ; Santamaría, J. / High-resolution and energy-filtered transmission electron microscopy of YBa2Cu3O7-x/PrBa2Cu3 O7 superlattices. in: Journal of Alloys and Compounds. 2001 ; Jahrgang 323-324. S. 558-561.
    @article{0a219cb113be4e4b9de8a6d8d954e776,
    title = "High-resolution and energy-filtered transmission electron microscopy of YBa2Cu3O7-x/PrBa2Cu3 O7 superlattices",
    abstract = "Structural disorder induced by epitaxial strain relaxation in c-axis oriented [YBa2Cu3O7-x n u.c/PrBa2Cu3O7 5 u.c.] superlattices on (100) SrTiO3 substrates has been analyzed by high-resolution and energy-filtered transmission electron microscopy. Epitaxial strain shows up in ultrathin YBCO layers with thickness below 4 unit cells. Strain relaxation takes place when layer thickness increases above this value. Microscopy observations for epitaxially strained superlattices show a good morphology of the layers, with sharp and flat interfaces. However, in relaxed samples rougher interfaces are observed, together with microdomains showing the c-axis parallel to the substrate plane which preserve the superlattice compositional profile. Such microdomains of c-parallel growth provide a path for reduced lattice mismatch, conforming a very efficient mechanism for strain relaxation.",
    keywords = "A. high-Tc superconductors, A. thin films, C. scanning and transmission electron microscopy",
    author = "M. Varela and C. Ballesteros and W. Grogger and Krishnan, {K. M.} and D. Arias and Z. Sefrioui and C. Le{\'o}n and J. Santamar{\'i}a",
    year = "2001",
    month = "7",
    day = "12",
    doi = "10.1016/S0925-8388(01)01143-4",
    language = "English",
    volume = "323-324",
    pages = "558--561",
    journal = "Journal of Alloys and Compounds",
    issn = "0925-8388",
    publisher = "Elsevier B.V.",

    }

    TY - JOUR

    T1 - High-resolution and energy-filtered transmission electron microscopy of YBa2Cu3O7-x/PrBa2Cu3 O7 superlattices

    AU - Varela, M.

    AU - Ballesteros, C.

    AU - Grogger, W.

    AU - Krishnan, K. M.

    AU - Arias, D.

    AU - Sefrioui, Z.

    AU - León, C.

    AU - Santamaría, J.

    PY - 2001/7/12

    Y1 - 2001/7/12

    N2 - Structural disorder induced by epitaxial strain relaxation in c-axis oriented [YBa2Cu3O7-x n u.c/PrBa2Cu3O7 5 u.c.] superlattices on (100) SrTiO3 substrates has been analyzed by high-resolution and energy-filtered transmission electron microscopy. Epitaxial strain shows up in ultrathin YBCO layers with thickness below 4 unit cells. Strain relaxation takes place when layer thickness increases above this value. Microscopy observations for epitaxially strained superlattices show a good morphology of the layers, with sharp and flat interfaces. However, in relaxed samples rougher interfaces are observed, together with microdomains showing the c-axis parallel to the substrate plane which preserve the superlattice compositional profile. Such microdomains of c-parallel growth provide a path for reduced lattice mismatch, conforming a very efficient mechanism for strain relaxation.

    AB - Structural disorder induced by epitaxial strain relaxation in c-axis oriented [YBa2Cu3O7-x n u.c/PrBa2Cu3O7 5 u.c.] superlattices on (100) SrTiO3 substrates has been analyzed by high-resolution and energy-filtered transmission electron microscopy. Epitaxial strain shows up in ultrathin YBCO layers with thickness below 4 unit cells. Strain relaxation takes place when layer thickness increases above this value. Microscopy observations for epitaxially strained superlattices show a good morphology of the layers, with sharp and flat interfaces. However, in relaxed samples rougher interfaces are observed, together with microdomains showing the c-axis parallel to the substrate plane which preserve the superlattice compositional profile. Such microdomains of c-parallel growth provide a path for reduced lattice mismatch, conforming a very efficient mechanism for strain relaxation.

    KW - A. high-Tc superconductors

    KW - A. thin films

    KW - C. scanning and transmission electron microscopy

    UR - http://www.scopus.com/inward/record.url?scp=18844479086&partnerID=8YFLogxK

    U2 - 10.1016/S0925-8388(01)01143-4

    DO - 10.1016/S0925-8388(01)01143-4

    M3 - Conference article

    VL - 323-324

    SP - 558

    EP - 561

    JO - Journal of Alloys and Compounds

    JF - Journal of Alloys and Compounds

    SN - 0925-8388

    ER -