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Enhanced critical current density of YBa2Cu3Ox films grown on Nd1/3Eu1/3Gd1/3Ba2Cu3Ox with nano-undulated surface morphology | | R. L. Meng
; T. H. Johansen
; I. A. Rusakova
; A. Baikalov
; D. Pham
; F. Chen
; Z. Y. Zuo
; C. W. Chu
; | | Date: |
2 Jun 2005 | | Subject: | Superconductivity | cond-mat.supr-con | | Affiliation: | 1 and 2), I. A. Rusakova , A. Baikalov , D. Pham , F. Chen , Z. Y. Zuo , C. W. Chu (1 and 3 and 4) ( Department of Physics and TCSUH, University of Houston, Houston, Texas, Department of Physics, University of Oslo, Oslo, Norway, Lawrence Berkeley N | | Abstract: | We report a simple and easily controllable method where a nano-undulated surface morphology of Nd1/3Eu1/3Gd1/3Ba2Cu3Ox (NEG) films leads to a substantial increase in the critical current density in superconducting YBa2Cu3Ox (YBCO) films deposited by pulsed laser deposition on such NEG layers. The enhancement is observed over a wide range of fields and temperatures. Transmission electron microscopy shows that such YBCO films possess a high density of localized areas, typically 20 x 20 nm2 in size, where distortion of atomic planes give rotational (2 to 5 degrees) moire patterns. Their distribution is random and uniform, and expected to be the origin of the enhanced flux pinning. Magneto-optical imaging shows that these films have excellent macroscopic magnetic uniformity. | | Source: | arXiv, cond-mat/0506059 | | Services: | Forum | Review | PDF | Favorites | |
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