Enhancement of Critical Current Density in the (YBa2Cu3O7-/Y2O3)  N Multilayered Films

Tran Hai Duc, Duong Thi Thanh Nhan, Nguyen Huy Sinh

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Published Sep 15, 2014

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DUC, Tran Hai; NHAN, Duong Thi Thanh; SINH, Nguyen Huy. Enhancement of Critical Current Density in the (YBa2Cu3O7-/Y2O3)  N Multilayered Films. VNU Journal of Science: Mathematics - Physics, [S.l.], v. 30, n. 3, sep. 2014. ISSN 2588-1124. Available at: <https://js.vnu.edu.vn/MaP/article/view/747>. Date accessed: 22 nov. 2024.
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Vol 30 No 3
Section
Review Article

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Abstract

Abstract: The enhancement of critical current density (Jc) in the (YBa2Cu3O7-d (YBCO)/Y2O3) ´ N multilayered films was reported. The (YBCO/Y2O3) ´ N multilayered films in which N was varied from 0 to 10 were prepared by using the pulsed laser deposition (PLD) technique. Magnetization data measured at 65 K showed that Jc of the (YBCO/Y2O3) ´ N multilayered films was enhanced in comparison with that of the pure YBCO film. More interestingly, the Jc enhancement was obtained to increase at small values of N, reach the maximum at N = 5, then decrease with increasing N to 10. The Jc enhancements in the (YBCO/Y2O3) ´ N multilayered films with N £ 5 were attributed to the increases in the number of single YBCO layers. The microstructure degradation in the (YBCO/Y2O3) ´ N multilayered films with N > 5 was likely to be reason for the decreases in their Jc, which was confirmed by using the scanning electron microscopy (SEM) images. 

Keywords: YBCO, critical current density Jc, multilayered films.

References

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