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The Microstructure and Superconducting Properties of Bi,Pb-2223 Thin Film Fabricated by RF Sputtering and Annealing Method

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5 Author(s)
Matsumoto, A. ; Nat. Inst. for Mater. Sci., Tsukuba, Japan ; Kitaguchi, H. ; Doi, T. ; Kajihara, T.
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We investigated the microstructures and superconducting properties of Bi,Pb-2223 thin films on SrTiO3(100) fabricated by radio-frequency (RF) sputtering and annealing. Most as-deposited films fabricated by RF sputtering did not exhibit a superconducting transition due to their low crystallinity, their deviation from the composition of Bi-2223, and their low intergrain connectivity. The as-deposited films did not contain Pb. To obtain the Bi,Pb-2223 phase, we annealed the film with Bi,Pb-2223 pellets and powder. After annealing, we confirmed that the thin film contained Pb. Tczero = 100 K was obtained in Bi,Pb-2223 thin film after post-annealing. We observed strong 00l peaks and a sharp quadrupole in X-ray θ - 2θ and φ-scan measurements. These results suggest that this film consists of a single phase of Bi,Pb-2223 and has a biaxial orientation. The Bi,Pb-2223 thin film had a maximum Jc of 0.1 × 105 A/cm2 at 78 K in a magnetic field of 2 T. Furthermore, Bi,Pb-2223 exhibited very strong anisotropy in its Jc-B angle characteristics.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:23 ,  Issue: 3 )

Date of Publication:

June 2013

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