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Structural studies and e?‘?c dependence in La2-e?‘¥Dye?‘¥Cae?‘|Ba2Cu4+e?‘|Oe?‘§ type mixed oxide superconductors

机译:La2-e?¥¥染料?¥¥ Cae?| Ba2Cu4 + e?′| Oe?′§型混合氧化物超导体的结构研究和e?c依赖性

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A new series of mixed oxide superconductors with the stoichiometric composition La2-e?‘¥Dye?‘¥Cae?‘|Ba2Cu4+e?‘|Oe?‘§ (e?‘¥ = 0.0 - 0.5, e?‘| = 2e?‘¥) has been studied for structural and superconductiong properties. Our earlier studies on La2-e?‘¥(Y/Er)e?‘¥Cae?‘|Ba2Cu4+e?‘|Oe?‘§ series, show a strong dependence of e?‘?c on hole concentration (e?‘?sh). In the present work, the results of the analysis of the neutron diffraction measurements at room temprerature on e?‘¥ = 0.3 and 0.5 samples are reported. It is interesting to know that Ca substitutes for both La and Ba site with concomitant displacement of La onto Ba site. Superconductivity studies show that maximum e?‘?c is obtained for e?‘¥ = 0.5, e?‘| = 1.0 sample (e?‘?c a?? 75 K), for La1.5Dy0.5Ca1Ba2Cu5Oe?‘§ (La-2125).
机译:化学计量组成为La2-e?'¥ Dye?'¥ Cae?'| Ba2Cu4 + e?'| Oe?'§(e?'¥ = 0.0-0.5,e?'| =的一系列新的混合氧化物超导体已经研究了2e?'¥)的结构和超导性质。我们对La2-e?'¥(Y / Er)e?'¥ Cae?'| Ba2Cu4 + e?'| Oe?'§系列的较早研究表明,e?'?c对空穴浓度(e ?'?sh)。在目前的工作中,报告了在室温下对e≥0.3和0.5个样品进行中子衍射测量的分析结果。有趣的是,Ca会同时取代La和Ba并取代La和Ba。超导性研究表明,对于e?¥¥ 0.5,e? = La1.5Dy0.5Ca1Ba2Cu5Oe?§(La-2125)的1.0个样本(e?'?c a ?? 75 K)。

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