Texture of MBE grown Cr films on α-Al2O3(0001): The occurrence of Nishiyama-Wassermann (NW) and Kurdjumov-Sachs (KS) related orientation relationships

S. Tsukimoto, F. Phillipp, T. Wagner

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    The orientation and texture of Cr(110) films on the basal plane of α-Al2O3 was investigated by transmission electron microscopy. The Cr was deposited via molecular beam epitaxy at a substrate temperature of 110°C resulting in the formation of crystallites with columnar mophology. Two orientation relationships (OR) were observed between Cr(110) and α- Al2O3(0001): Cr[001] // α-Al2 O3[̄110] and Cr[̄111] // α-Al2 O3[̄110]. Each of these orientation relationships exhibited two variants which were rotated ±5.26° around the substrate normal. The orientation relationships can be rationalized on the basis of geometry, rotational symmetry and lattice mismatches of the Cr/(110) /α-Al2O3(0001) interface. The occurrence of all OR can be related to Nishiyama-Wassermann (NW) and Kurdjumov-Sachs (KS) orientations and are discussed with respect to previous experimental results and geometrical parameters of other bcc metals which were grown on α-Al2O3(0001).

    Original languageEnglish
    Pages (from-to)2947-2954
    Number of pages8
    JournalJournal of the European Ceramic Society
    Volume23
    Issue number15
    DOIs
    Publication statusPublished - 2003

    Keywords

    • Lattice
    • Microstructure
    • Substrates

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry

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