Characterization of doped Nd-based superconductors
| Autor: | Kenji Okazaki, R.J. De Angelis, L. E. DeLong, V. Le Tourneau, Stuart A. Wolf, X. X. Ding, T. N. O'Neal, D. R. Zint, Charles E. Hamrin, W.D. Arnett, Michael Osofsky, D. K. Kim, W. D. Ehmann, Joseph W. Brill |
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| Rok vydání: | 1988 |
| Předmět: |
Superconductivity
Lanthanide Materials science Physics and Astronomy (miscellaneous) Analytical chemistry chemistry.chemical_element Condensed Matter Physics Magnetic susceptibility Neodymium Electronic Optical and Magnetic Materials Lattice constant chemistry Electrical resistivity and conductivity X-ray crystallography Orthorhombic crystal system |
| Zdroj: | Journal of Superconductivity. 1:427-440 |
| ISSN: | 1572-9605 0896-1107 |
| DOI: | 10.1007/bf00618599 |
| Popis: | Y-, Dy-, and Gd-doped neodymium (Nd) superconductors (RE/sub 0.1/Nd/sub 0.9/Ba/sub 2/minus//Cu/sub 3/O/sub y/) exhibited sharp resistivity transitions at 92 K. DC susceptibility measurements gave a common curve with diamagnetic onsets at 93 K and transitions complete at /approximately/ 50 K. Lattice constants for an assumed orthorhombic structure were calculated from X-ray diffraction measurements. These values were used to create a simulated diffraction pattern with 2/theta/ values and relative intensities that agreed well with observed values. Oxygen contents determined by instrumental neutron activation analysis, ranged from 14.7 to 15.1 /plus minus/ 0.1 wt % (6.59 /le/ y in O/sub y/ /le/ 6.73). This range of oxygen content for YBa/sub 2/Cu/sub 3/O/sub y/ gives /approximately/ 50-60 K transitions in marked contrast to the 92 K (midpoint) values for the materials of this study. |
| Databáze: | OpenAIRE |
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