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Gd1-xCaxBa2Cu3O7-y高温超导体压力效应的研究

韩翠英 方芳 解思深

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Gd1-xCaxBa2Cu3O7-y高温超导体压力效应的研究

韩翠英, 方芳, 解思深

HIGH-PRESSURE STUDIES OF THE Gd1-xCaxBa2Cu3O7-y HIGH-Tc SUPERCONDUCTORS

HAN CUI-YING, FANG FANG, XIE SI-SHEN
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  • 研究了Gd1-xCaxBa2Cu3O7-y(0.0≤X≤0.20)高温超导体在常压和高压下的超导电性在1-300K温度范围内,利用Bridgman对顶砧获得压力达9.0GPa,测量了(X=0.10,0.15,0.20)样品的dTc/dp分别为7.68,7.8和4.46K/GPa。发现Tc的压力导数随着ca2+含量的增加而下降,分析了氧含量对Tc和dTc/dP的影响.利用常压下晶格参数精修值和阳离子与氧离子间距随压力的改变,说明CuO2面在超导电性上的作用,用CuO2面之间耦合解释Tc(P)曲线的非线性关系。
    We have investigated the superconductivity of Ca2+-dopped Gd1-xCaxBa2Cu3O7-y compounds under both ambient and high pressure. Using a Bridgman-anvil cell, the high pressure up to 9.0GPa, in temperature range of 1-300K, have been obtained. The superconducting transition temperature Tc (onset) initially increases with pressure at a rate of dTc/dP=7.68, 7.8 and 4.46K/GPa for x=0.10, 0.15, 0.20 samples at 0GPac has been investigated. By using the data of the structural parameters of samples at ambient pressure and the changes of the distances between cation and oxygen with the pressure, the role of the CuO2 plane on superconductivity is demonstrated. The coupling between the CuO2 planes may be used to explain the nonlinear dependence of Tc(P).
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  • 被引次数: 0
出版历程
  • 收稿日期:  1993-09-20
  • 刊出日期:  1994-05-05

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