Anomalous thermal effect of Y1-xCaxBa2Cu3Oy

被引：0
|
作者：
Zhang, L [1 ]
Sun, XF [1 ]
Rui, XF [1 ]
Zhang, H [1 ]
机构：
[1] Peking Univ, Dept Phys, Phys Mat Lab, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2005年 / 19卷 / 1-3期
关键词：
thermal analysis; superconductivity; Y1-xCaxBa2Cu3Oy;
D O I：
10.1142/S0217979205028487
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
It is found in oxygen there are a weight loss and an endothermal anomaly in compound of Y1-xCaxBa2Cu3Oy starting at about 320 degrees C, while in nitrogen at about 370 degrees C and a mixed atmosphere, N-2(50%)+O-2(50%), at about 350 degrees C. The results are different from those in undoped YBa2Cu3Oy and some doped systems. It is suggested that Ca prefers a sixfold coordination, which causes the oxygen loss in Cu(2)-O plane and the weight and heat anomalies at different temperature in different atmospheres. The oxygen loss in Cu(2)-O plane is also responsible for T-C suppression in Y1-xCaxBa2Cu3Oy.
引用
收藏
页码：315 / 317
页数：3
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