Similar depression of Tc by Zn and Ni impurities in 1:2:3 (Ca0.4La0.6)(Ba1.35La0.65)(Cu1-zMz)3Oy.
Similar depression of Tc by Zn and Ni impurities in 1:2:3 (Ca0.4La0.6)(Ba1.35La0.65)(Cu1-zMz)3Oy.
复制标题
1:2:3 (Ca0.4La0.6)(Ba1.35La0.65)(Cu1-zMz)3Oy 中的 Zn 和 Ni 杂质对 Tc 具有类似的降低作用。
DOI：
10.1103/physrevb.54.13348
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Eckstein
中科院分区：
文献类型：
--
作者：
Goldschmidt;Direktovitch;Knizhnik;Eckstein
Substitution of M=Zn or Ni impurities in 1:2:3 (${\mathrm{Ca}}_{0.4}$${\mathrm{La}}_{0.6}$)(${\mathrm{Ba}}_{1.35}$${\mathrm{La}}_{0.65}$)(${\mathrm{Cu}}_{1\mathrm{\ensuremath{-}}\mathit{z}}$${\mathit{M}}_{\mathit{z}}$${)}_{3}$${\mathrm{O}}_{\phantom{\rule{0ex}{0ex}}\mathit{y}}$ depresses ${\mathit{T}}_{\mathit{c}}^{\mathrm{max}}$ with almost equal effectiveness, i.e., -9 and -7 K/%, respectively. (In YBCO, Zn is three times more effective in depressing ${\mathit{T}}_{\mathit{c}}$ than Ni.) In these impurity-containing materials, the dependence of thermopower on ${\mathit{T}}_{\mathit{c}}$/${\mathit{T}}_{\mathit{c}}^{\mathrm{max}}$ departs substantially from the universal behavior observed in other cuprates. There is no definite trend in the resistivity of these ceramic materials with impurity concentration z. Our results suggest pair breaking or weakening of the interaction at constant carrier density when z is increased. \textcopyright{} 1996 The American Physical Society.
