Defect chemical study of Nd2−xCexCuO4−δ
✍ Scribed by Shu Yamaguchi; Ken Yasui; Futoshi Matsumoto; Kazuya Terabe; Tôru Sukigara; Yoshiaki Iguchi
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 526 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0167-2738
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The local atomic and electronic structure of cerium substitutional defects in Ndl.soCeo.2oCuO4+ 8 was investigated by means of X-ray absorption spectroscopy (EXAFS and XANES of Ce L m edge), as a function of the oxygen partial pressure. It has been found that in all of the experimental conditions in
In Pr2.xCexCu04. 6 compounds with x -0.15, 0.18, we observed superconductivity below about 20 K. We measured magnetic hysteresis at 5 K in fields of 0.01-I.I T. Above 0.5 T, the single-ion paramagnetism of Pr(3+) overwhelms the superconductivity. After correction, the superconductive M-H hysteresis