Oxygen content and superconductivity of Ca-to-Y substitution in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub>
N L Wang; M C Tan; J S Wang; S Y Zhang; H B Jiang; J Sha; Q R Zhang; N L Wang; Dept. of Phys., Zhejiang Univ., Hangzhou, China; M C Tan; Dept. of Phys., Zhejiang Univ., Hangzhou, China; J S Wang; Dept. of Phys., Zhejiang Univ., Hangzhou, China; S Y Zhang; Dept. of Phys., Zhejiang Univ., Hangzhou, China; H B Jiang; Dept. of Phys., Zhejiang Univ., Hangzhou, China; J Sha; Dept. of Phys., Zhejiang Univ., Hangzhou, China; Q R Zhang; Dept. of Phys., Zhejiang Univ., Hangzhou, China
Журнал:
Superconductor Science and Technology
Дата:
1991-01-01
Аннотация:
The oxygen content and superconductivity of Ca-to-Y substitution in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> was studied. By comparison with that of Pr substituted YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> system, it is found that the oxygen content as well as the formal oxidation state of Cu is not a factor directly predominating T<sub>c</sub>. The depression of T<sub>c</sub> is connected with the reducing of the mobile holes in CuO<sub>2</sub> sheets.
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