TY - JOUR
T1 - Enhanced critical current density of YBa2Cu3O x films grown on Nd1/3Eu1/3Gd 1/3Ba2Cu3Ox with nano-undulated surface morphology
AU - Meng, R. L.
AU - Johansen, T. H.
AU - Rusakova, I. A.
AU - Baikalov, A.
AU - Pham, D.
AU - Chen, F.
AU - Zuo, Z. Y.
AU - Chu, C. W.
N1 - Funding Information:
We thank Y.Y. Sun for X-ray analysis of the samples. The work at Houston is supported in part by NSF Grant DMR-9804325, the T.L.L. Temple Foundation, the John and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston; and at Lawrence Berkeley Laboratory by the Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering of the US Department of Energy under Contract No. DEAC03-76SF00098. One of the authors (T.H.J.) is grateful to the Norwegian Research Council for financial support.
PY - 2006/2/1
Y1 - 2006/2/1
N2 - We report a simple and easily controllable method where a nano-undulated surface morphology of superconducting Nd1/3Eu1/3Gd 1/3Ba2Cu3Ox (NEG) films leads to a substantial increase in the critical current density in superconducting YBa 2Cu3Ox (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 × 20 nm 2 in size, where distortion of atomic planes give rotational (2-5°) moiré 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.
AB - We report a simple and easily controllable method where a nano-undulated surface morphology of superconducting Nd1/3Eu1/3Gd 1/3Ba2Cu3Ox (NEG) films leads to a substantial increase in the critical current density in superconducting YBa 2Cu3Ox (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 × 20 nm 2 in size, where distortion of atomic planes give rotational (2-5°) moiré 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.
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U2 - 10.1016/j.physc.2005.11.013
DO - 10.1016/j.physc.2005.11.013
M3 - Article
AN - SCOPUS:32244446809
SN - 0921-4534
VL - 434
SP - 39
EP - 44
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1
ER -