High-resolution electron microscope analysis of new type of superconductors in a BaCaCuCO Oxycarbonate system
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Key factor for low anisotropy and high irreversibility field in (Cu,C)Ba<inf>2</inf>Ca<inf>3</inf>Cu<inf>4</inf>O<inf>11+δ</inf>
2022, Materials Today PhysicsCitation Excerpt :In early reports, it has been proposed that the C atoms partially substitute the Cu sites in the charge reservoir block [37]. The high-resolution transmission electron microscope and the electron diffraction measurements have revealed a superstructure of 2a × b × 2c in (Cu,C)-1234 [38–40]. Since the light elements, such as carbon and oxygen, are invisible when imaged together with heavier elements in one image by using the HAADF-STEM technique, we then used the iDPC-STEM technique in order to figure out carbon, and the result is shown in Fig. 3b.
Ba-Ca-Cu oxycarbonate thin films, prepared by pulsed laser deposition: Structure, growth mechanism and superconducting properties
1999, Physica C: Superconductivity and its ApplicationsStructure families of superconducting oxides and interstitial alloys
1998, Superconductor Science and TechnologyAnion substitutions and insertions in copper oxide superconductors
1997, Superconductor Science and TechnologySynthesis of novel inorganic structures under unusual high pressure gas and hydrothermal conditions
1999, Journal of Materials Chemistry
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