Intrinsic Josephson properties in Pb1-ySr2Y1-xCaxCu2+yO7+δ epitaxial films
Intrinsic Josephson properties in Pb1-ySr2Y1-xCaxCu2+yO7+δ epitaxial films
复制标题
Pb1-ySr2Y1-xCaxCu2+yO7+δ 外延薄膜的本征约瑟夫森特性
DOI：
10.1088/1742-6596/568/2/022025
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Sachio Komori and Itsuhiro Kakeya
中科院分区：
文献类型：
--
作者：
Y. Nomura;T. Mizuno;H. Kambara;Y. Nakagawa;and I. Kakeya,;Yukio Kawano;Sachio Komori and Itsuhiro Kakeya
We report the first observation of intrinsic Josephson junction (IJJ) characteristics in the Pb{sub 1-y}Sr{sub 2}Y{sub 1-x}Ca{sub x}Cu{sub 2+y}O{sub 7+δ} (Pb1212) epitaxial film. Pb1212 epitaxial film has been grown on SrTiO{sub 3} (100) substrates by a two-step growth technique. A small mesa structure (S = 4μm{sup 2}) has been fabricated on a film surface using a standard photolithography and an Ar ion milling technique. The superconducting transition temperature of the IJJ is 43 K. At 4.2 K, the value of J{sub c} (the critical current density) is 2.2 kA/cm{sup 2}. The depth of the hysteresis defined as α = (J{sub c}+J{sub r})/ J{sub c} is 0.89, where J{sub r} is the return current density. The temperature dependence of J{sub c} shows good agreement with Ambegaokar-Baratoff theory.
We report the first observation of intrinsic Josephson junction (IJJ) characteristics in the Pb{sub 1-y}Sr{sub 2}Y{sub 1-x}Ca{sub x}Cu{sub 2+y}O{sub 7+δ} (Pb1212) epitaxial film. Pb1212 epitaxial film has been grown on SrTiO{sub 3} (100) substrates by a two-step growth technique. A small mesa structure (S = 4μm{sup 2}) has been fabricated on a film surface using a standard photolithography and an Ar ion milling technique. The superconducting transition temperature of the IJJ is 43 K. At 4.2 K, the value of J{sub c} (the critical current density) is 2.2 kA/cm{sup 2}. The depth of the hysteresis defined as α = (J{sub c}+J{sub r})/ J{sub c} is 0.89, where J{sub r} is the return current density. The temperature dependence of J{sub c} shows good agreement with Ambegaokar-Baratoff theory.