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In: Nippon seramikkusu kyokai gakujutsu ronbunshi, Jg. 110 (2002), Heft 3, S. 180-185
academicJournal
- print, 15 ref
Zugriff:
Superconductors, Tl2-zBa2Ca1.95Y0.05Cu3Oy, with variable Tl contents were prepared. We investigated the dependence of their properties, crystal structures and Tc on the Tl content. The Cu valence decreased with decreasing Tl content, 2-z, in the region of 2-z≥1.5 but increased in the region of 1.2≤2-z<1.5. The critical temperature, Tc changed with decreasing Tl content. Tc(zero) was 116 K at 2 -z=1.7. When the Tl content was decreased, Tc(zero) reached the maximum value of 119 K at 2-z=1.2. The results of structure refinements of samples with different Tl contents with neutron powder diffraction data show that Cul-Ca, Y and Cu2-Ca, Y lengths had the largest and smallest values at 2-z=1.5. At this Tl content, Tc(zero) was the lowest of 108 K, and copper-apical oxygen (Cu2-03) bond length was the smallest.
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Autor/in / Beteiligte Person: | IDEMOTO, Yasushi ; NISHIKAWA, Jun ; KOURA, Nobuyuki ; KAMIYAMA, Takashi ; IZUMI, Fujio |
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Zeitschrift: | Nippon seramikkusu kyokai gakujutsu ronbunshi, Jg. 110 (2002), Heft 3, S. 180-185 |
Veröffentlichung: | Tokyo: Nippon seramikkusu kyokai, 2002 |
Medientyp: | academicJournal |
Umfang: | print, 15 ref |
ISSN: | 0914-5400 (print) |
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