Preparation of the bulk superconductor Tl2Ba2Ca3Cu4O12
1989; Elsevier BV; Volume: 158; Issue: 1-2 Linguagem: Inglês
10.1016/0921-4534(89)90300-6
ISSN1873-2143
AutoresMasae Kikuchi, Satoru Nakajima, Yasuhiko Syono, K. Hiraga, Takeo Oku, Daisuke Shindo, Norio Kobayashi, M. Iwasaki, Yoshio Mutô,
Tópico(s)Rare-earth and actinide compounds
ResumoThe bulk superconductor Tl2Ba2Ca3Cu4O12 with Tc (onset) above 112 K has been prepared and structure and chemical composition were examined by X-ray powder diffraction, analytical (EDX) and high resolution electron microscopy. Unit cell dimensions for the tetragonal cell determined by the least squares method are a = 3.853 (1) Å, c=41.98 (3) Å. The transition temperature, Tc, of the double layered Tl system increases with the number of Cu-O layers (n) up to n = 3, while it turns down at n = 4.
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