Abstract
We have investigated superconducting properties and orientation behavior of RE123 ( RE = Yb , Er , Sm , Nd and La ) films on MgO and SrTiO 3 substrates by metal-organic deposition technique using metal naphthenates. On MgO substrates, only Yb123 films showed superconducting transition with Tc( zero ) of 77.0 K and c-axis orientation with in-plane alignment. On SrTiO3 substrates, Yb123 , Er123 , Sm123 , Nd123 and La123 films showed c-axis orientation with in-plane alignment, and Tc( zero ) of 89.5 K, 89.7 K, 80.5 K, 85.0 K and 47.6 K, respectively. Sm123 and La123 films showed square and plate-like grains on MgO substrates, and relatively flat surface covered with well-grown grains on SrTiO 3 substrates.
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