Pulsed laser deposition synthesis of superconducting (Cu,C)Ba2CuOx thin films |
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| Authors: | K Kikunaga T Yamamoto Y Tanaka N Kikuchi K Tokiwa T Watanabe N Terada |
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| Institution: | 1. National Institute of Advanced Industrial Science and Technology, Tosu 841-0052, Japan;2. Kagoshima University, Kagoshima 890-0065, Japan;3. National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan;4. Tokyo University of Science, Noda 278-8510, Japan |
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| Abstract: | (Cu, C)–Ba–O thin films have been deposited at low growth temperature of 450–570 °C by pulsed laser deposition method. A control of CO2 gas pressure and the growth temperature, usage of BaCuyOx pellet target resulted in an expansion of twice c-axis length of BaCuO2 structure (2c phase) and a significant rise of conductivity. Measurements of in-situ XPS suggest that the 2c phase should be (Cu, C)Ba2CuOx (Cu, C)-1201]. The maximum temperature of onset of the superconducting transition and zero resistance state obtained so far were 60 and 47 K, respectively. |
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| Keywords: | High temperature superconductor Thin film PLD (Cu C)-system 1201 phase Low temperature growth |
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