Effect of Ga addition to YBa2Cu3O7.
Effect of Ga addition to YBa2Cu3O7.
复制标题
YBa2Cu3O7 中添加 Ga 的影响。
DOI：
10.1103/physrevb.38.7084
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Suenaga
中科院分区：
文献类型：
--
作者：
Xu;Sabatini;Moodenbaugh;Suenaga
对于标称成分 x 小于或等于 0.10，已经研究了 YBa/sub 2/(Cu/sub 1-//sub x/Gai/sub x/)/sub 3/O/sub y/ 中 Ga 替代 Cu 的影响。当 x>0.03 时，样品是四方的。当 x 大于或等于 0.05 时，第二相的证据出现在 X 射线衍射图中。超导转变温度 T/sub c/ 随着 x 的增加而系统地下降。 T/sub c/ 和晶格参数与标称 x 的系统变化表明 Ga 固溶体可能延伸至 x = 0.05。然而，电子探针结果表明，Ga 掺入超导相的情况极其有限；超导相的Ga含量x看来x小于或等于0.01。通过微探针还观察到0.01≤tox≤0.10的富Ga第二相。
The effect of Ga substitution for Cu in YBa/sub 2/(Cu/sub 1-//sub x/Gai/sub x/)/sub 3/O/sub y/ has been investigated for nominal compositions xless than or equal to0.10. Samples are tetragonal for x>0.03. For xgreater than or equal to0.05, evidence for second phase appears in x-ray-diffraction diagrams. Superconducting transition temperature T/sub c/ falls systematically with increasing x. The systematic variations in T/sub c/ and lattice parameters with nominal x suggest that Ga solid solution may extend to x = 0.05. However, electron microprobe results indicate that Ga incorporation into the superconducting phase is extremely limited; the Ga content x of the superconducting phase appears to be xless than or equal to0.01. A Ga-rich second phase is also observed by microprobe for 0.01less than or equal toxless than or equal to0.10.