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원문정보
초록
영어
We investigated the structural suitability of GdFeO3 (GdFO) as a buffer layer for the GdBa2Cu3O7-x (GdBCO) superconducting films. GdFO films with different thicknesses and GdBCO thin films were all prepared by using a pulsed laser deposition technique. The analyses of X-ray diffraction and EXAFS data indicates that the c-axis parameter increases and the Fe-O bond length decreases with the GdFO thickness due to the compressive stain induced by the lattice mismatch between GdFO and STO substrate and as a result, the Debye-Waller factor, an index of disorder in the local structure near the Fe-O bond, increases with the GdFO thickness. However, for the GdBCO/GdFO bilayer structure, the Debye-Waller factor decreases as the GdFO thickness increases indicating a diminished disorder by the structural coupling between GdFO and GdBCO. These results indicate that an appropriate thickness of GdFO is required to be utilized as a magnetic buffer layer for the GdBCO superconducting films.
목차
Abstract 1. 서론 2. 실험 3. 결과 및 토의 4. 결론 ACKNOWLEDGMENTS REFERENCES
키워드
GdBCOGdFeO3magnetic buffer layerEXAFS
저자
H. S. Park [ Department of Physics, Chungbuk National University, Cheongju 28644, Korea ]
J. Y. Oh [ Department of Physics, Chungbuk National University, Cheongju 28644, Korea ]
B. H. Song [ Department of Physics, Chungbuk National University, Cheongju 28644, Korea ]
B. Kang [ Department of Physics, Chungbuk National University, Cheongju 28644, Korea ]
Corresponding author