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  • 1
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 2728-2730 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The microstructure and chemistry of the as-grown, the postannealed and the forming-gas-atmosphere-treated Pt/Ba0.7Sr0.3TiO3/Pt capacitors are studied by means of high-resolution transmission electron microscopy and energy-disperse x-ray spectroscopy. It is found that the annealed Ba0.7Sr0.3TiO3 films have larger grain size and more smooth top film-electrode interfaces. High-resolution images reveal the presence of disordered or amorphous regions at the interfaces in the Ba0.7Sr0.3TiO3 film heated in the forming-gas atmosphere. These regions show a higher Ti/(Ba+Sr) ratio than the grain matrix. The effects of these amorphous regions on the electrical properties of Ba0.7Sr0.3TiO3 films are discussed. © 2002 American Institute of Physics.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Journal of superconductivity 13 (2000), S. 153-162 
    ISSN: 1572-9605
    Schlagwort(e): superconducting thin films ; AFM ; TEM ; activation energy ; upper critical magnetic field
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract Epitaxial Bi2Sr2−xLa x Cu1O6+δ thin films were grown on vicinal substrates by magnetron sputtering. The growth mode and the superconductivity of the thin films were studied. The films were deposited on 5–7° misoriented (100) SrTiO3 (STO). The surface of misoriented substrate is tilted to the 〈111〉 azimuth. The topographies of the Bi-2201 films show strip-like shapes. The transmission electron microscopy (TEM) study revealed that the films grew with very good in-plane alignments which were comparable to those of single crystals. Both of the temperature dependence of the a- and c-axis resistivities were studied under magnetic fields. The corresponding anisotropic activation energies and upper critical magnetic fields were investigated.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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