Abstract
Various high-Tc superconductors of the La–(Ba,Sr)–Cu–O and the M–Ba–Cu–O systems with M = Y, Er, and Eu have been prepared by the solid-state reaction method. Single-phase samples with no additional diffraction peaks as verified by x-ray diffraction (XRD) measurements have been obtained. Measurements of the electrical resistivity and of the magnetization showed sharp superconducting transitions with a width of 1 K. The measurements of the magnetic susceptibility have been extended above room temperature up to 770 K. There is clear evidence for the formation of a magnetic moment in all M–Ba–Cu–O samples. Monochromated x-ray photoelectron spectroscopy (MXPS) valence band and x-ray photoelectron spectroscopy (XPS) core level spectra have been measured on various samples at room temperature and at liquid nitrogen temperature.
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Jenny, H., Walz, B., Leeman, G. et al. Magnetic and electronic properties of M-Ba–Cu–O (M = Y, Er, Eu). Journal of Materials Research 2, 775–778 (1987). https://doi.org/10.1557/JMR.1987.0775
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DOI: https://doi.org/10.1557/JMR.1987.0775