Preparation method of YBCO film with high magnetic flux pinning performance
A high-flux and pinning technology, which is applied to superconductor components and other directions, can solve the problems that restrict the large-scale industrialization of high-flux pinning, and achieve enhanced magnetic flux pinning performance, low preparation parameter requirements, and improved critical mass. The effect of current density
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Embodiment 1
[0044] A 50nm thick PZT gel film was prepared on a lanthanum aluminate single crystal substrate by dipping and pulling method, and the obtained gel film was dried in the air for 15min at a drying temperature of 80°C; the obtained gel film was passed through The mask of the circular lattice micropattern was exposed to ultraviolet rays with a wavelength of 320nm for 600s; the treated gel film was washed in methanol for 10s to obtain the micropattern of the corresponding gel film; the treated gel film was heated at 800°C Heat treatment for 1h to obtain crystallized PZT micro-patterns; the prepared PZT micro-patterns were dipped and pulled to obtain a YBCO gel film; Heat treatment in a mixed atmosphere composed of nitrogen for 1.5h, the heat treatment temperature is 750°C, and the treated YBCO gel film is oxidized and annealed at 400°C for 1h in a pure oxygen atmosphere to prepare a YBCO film modified with PZT fine patterns.
Embodiment 2
[0046]Prepare a 100nm-thick BST gel film on a lanthanum aluminate single crystal substrate by dipping or spin coating, and dry the prepared gel film in air for 20min at a drying temperature of 100°C; The gel film was exposed to ultraviolet rays with a wavelength of 340nm for 1000s through a circular lattice micro-pattern mask; the processed gel film was washed in ethanol for 15s to obtain the micro-pattern of the corresponding gel film; the processed gel film Heat treatment at 850°C for 1.5h to obtain crystallized BST micro-patterns; the prepared BST micro-patterns were dipped and pulled to obtain a YBCO gel film; Heat treatment in a mixed atmosphere composed of % water vapor and 93% nitrogen for 1.5h, the heat treatment temperature is 770°C, and the treated YBCO gel film is oxidized and annealed at 450°C for 2h in a pure oxygen atmosphere to prepare a YBCO film modified with BST fine patterns .
Embodiment 3
[0048] A 120nm thick YSZ gel film was prepared on a lanthanum aluminate single crystal substrate by spin coating method, and the obtained gel film was dried in air for 25min at a drying temperature of 100°C; the obtained gel film was passed through The mask of the zigzag line pattern was exposed to ultraviolet rays with a wavelength of 360nm for 1500s; the treated gel film was washed in n-butanol for 15s to obtain the fine pattern of the corresponding gel film; the treated gel film was heat-treated at 850°C 1.5h, the crystallized YST micro-pattern was obtained; the YST micro-pattern was prepared by dipping and pulling method to obtain the YBCO gel film; Heat treatment in a mixed atmosphere composed of nitrogen for 1.5h, the heat treatment temperature is 770°C, and the treated YBCO gel film is oxidized and annealed at 450°C for 2h in a pure oxygen atmosphere to prepare a YBCO film modified with YSZ fine patterns.
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