HRTEM characterization of atomic structures in Cu/α-Al2O3 (0001) interface

Takeo Sasaki, Katsuyuki Matsunaga, Hiromichi Ohta, Hideo Hosono, Takahisa Yamamoto, Yuichi Ikuhara

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Thin Cu film was deposited on the (0001) surface of α-Al2O3 by a pulsed-laser deposition technique at substrate temperature of 800°C. The atomic structure of Cu/Al2O3 (0001) interface was characterized by high-resolution transmission electron microscopy (HRTEM). It was found that the interface was atomically sharp and the following orientation relationship (OR) was existed; (111)Cu//(0001)Al(2)O(3), [11̄0]Cu//[11̄00]Al(2)O(3). In contrast, the OR with geometrically high coherency across the interface was evaluated by the coincidence of reciprocal lattice points method, and the result showed that the preferred OR was (111)Cu//(0001)Al(2)O(3), [112̄]Cu//[11̄00]Al(2)O(3). This OR is not consistent with the experimental results, and suggests that interfacial chemical bonding plays an important role to form the actual OR. In order to understand the nature of the chemical bonding at the interface, HRTEM image simulations were performed and their results were compared with the experimental images. It was found that the Cu(111)/Al2O3(0001) interface terminated at oxygen-layer, which indicates that Cu-O bonds determine the stability of the interface.

    Original languageEnglish
    Pages (from-to)555-559
    Number of pages5
    JournalZairyo/Journal of the Society of Materials Science, Japan
    Volume52
    Issue number6
    DOIs
    Publication statusPublished - 2003 Jun

    Keywords

    • Atomic structure
    • Coincidence of reciprocal lattice points method (CRLP)
    • Cu/AlO (0001) interface
    • High resolution transmission electron microscopy (HRTEM)
    • Orientation relationship

    ASJC Scopus subject areas

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

    Fingerprint Dive into the research topics of 'HRTEM characterization of atomic structures in Cu/α-Al<sub>2</sub>O<sub>3</sub> (0001) interface'. Together they form a unique fingerprint.

    Cite this