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摘要: 在零电阻温度Tc0达到120 K的TlBaCa3Cu3Oy超导体中，掺入不同含量的Pb后，超导电性受到抑制，点阵常数减小。加压时，Tc先随压力p的增加而上升，样品1（xPb=0.05）的dTc0/dp=1.7 K/GPa，样品2（xPb=0.5）的dTc0/dp=2.2 K/GPa。Tc的峰值随Pb的增加而减小。加压时，对由于Pb的加入引起的CuO层的精细结构变化起到调制作用。Abstract: Pb doped TlBaCaCuO compounds with nominal composition TlPbxBaCa3Cu3Oy have been synthesized and their physical properties have been studied. The pressure-dependence of Tc has also been studied. It is found that Tc increases with pressure at a rate of dTc0/dp=2.2 K/GPa for x=0.5, which is higher than dTc0/dp=1.8 K/GPa for pure TlBaCaCuO.
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Chu C W, Hor P H, Meng R L, et al. Phys Rev Lett, 1987, 26: 405. Sato M, Onoda M, Shamoto S, et al. Chem Lett, 1987, (2). Zhang J L, Cui C G, Li S L, et al. Modern Phys Lett B, 1988, 2(7). Hor P H, Gao L, Meng R L, et al. Phys Rev Lett, 1987, 58: 911. Liu Z X, Zheng D N, Yan Y F, et al. Modern Phys Lett B. -
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