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Effects of tin-compounds addition on Jc and microstructure for YBCO films |
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| Authors: | R Teranishi Y Miyanaga K Yamada N Mori M Mukaida M Miura M Yoshizumi T Izumi M Namba S Awaji K Watanabe |
| Institution: | 1. Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;2. Superconductivity Research Laboratory – ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan;3. Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan |
| Abstract: | Tin-compounds were doped into YBa2Cu3O7−δ (YBCO) films as pinning centers to enhance Jc in magnetic fields. YBCO films were grown by a metal organic deposition process using tri-fluoroacetates starting solutions. Tin-acetylacetonate salts were then dissolved into the starting solution as pinning centers. Jc of the YBCO films with tin-acetylacetonates were enhanced in all magnetic field angles. Transmission electron microscopy (TEM) and TEM-EDS (Energy Dispersive X-ray Spectroscopy) observations revealed the existence of tin-compound particles with the size of about 30 nm in the YBCO film. These nano particles were distributed randomly in the film and were considered to act as 3-dimentional pinning centers. |
| Keywords: | YBa2Cu3O7&minus δ films TFA MOD Critical current density |
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