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Method for preparing double mismatch multi-element doped composite YBCO thin film
The invention discloses a method for preparing a double mismatch multi-element doped YBCO thin film, and belongs to the field of high-temperature superconducting material preparation. The method includes the following steps: using an organic salt as a precursor salt, adopting a chemical solution method to prepare a precursor solution, coating an LAO single crystal substrate with the precursor solution using a spin coating method, and then carrying out a heat treatment process on the single crystal surface to compound a film. The mismatches between the two doping phases and YBCO are respectively positive mismatch and negative mismatch, and the strain introduced by the two-phase doping particles has a pinning action partially and is offset on the whole, so that the YBCO structure is prevented from being damaged due to over large lattice distortion, for example, the film crack action at a high doping level is prevented. The sintering process used by the invention is short in time, and does not affect the oriented growth of YBCO while forming the BYNO and LAO phases; the current-carrying capability of the thin film prepared by using the method provided by the invention is 4 times higher than that of the 7.5% BYNO single doped sample and 1.7 times higher than that of the 2.5% LAO single doped sample, and the superconducting capability of the thin film is more effectively increased.
Method for preparing double mismatch multi-element doped composite YBCO thin film
The invention discloses a method for preparing a double mismatch multi-element doped YBCO thin film, and belongs to the field of high-temperature superconducting material preparation. The method includes the following steps: using an organic salt as a precursor salt, adopting a chemical solution method to prepare a precursor solution, coating an LAO single crystal substrate with the precursor solution using a spin coating method, and then carrying out a heat treatment process on the single crystal surface to compound a film. The mismatches between the two doping phases and YBCO are respectively positive mismatch and negative mismatch, and the strain introduced by the two-phase doping particles has a pinning action partially and is offset on the whole, so that the YBCO structure is prevented from being damaged due to over large lattice distortion, for example, the film crack action at a high doping level is prevented. The sintering process used by the invention is short in time, and does not affect the oriented growth of YBCO while forming the BYNO and LAO phases; the current-carrying capability of the thin film prepared by using the method provided by the invention is 4 times higher than that of the 7.5% BYNO single doped sample and 1.7 times higher than that of the 2.5% LAO single doped sample, and the superconducting capability of the thin film is more effectively increased.
Method for preparing double mismatch multi-element doped composite YBCO thin film
SUO HONGLI (author) / XU YAN (author) / LIU MIN (author) / MA LIN (author) / YI NING (author)
2015-12-30
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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