Determination of Biaxial Texture of Thick Film EuBa2Cu3O7-δ Homo-substrate by X-ray Diffraction

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概要

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• We have initially aligned polycrystalline EuBa2Cu3O7-δ (Eu-123) Superconductor using a magnetic force and a mechanical force simultaneously to fabricate biaxially aligned rare earth (RE) substituted Eu-123 thick films as homo-substrates for growth of epitaxial YBa2Cu3O7-δ superconductor thin films. The characterization of such Eu-123 thick films by X-ray pole figure study indicated that the polycrystalline Eu-123 grains having substantial biaxial alignment with their grain [001] axes perpendicular to the surfaces of the thick films and [010] axes parallel to the magnetic field direction in the specimen plane. We were the first to determine the biaxial alignment of Eu-123 homo-substrate by quantitative analysis of X-ray diffraction $\chi$-circle and $\varphi$-circle scans of (013)/(103) reflections, demonstrating a degree of 33% alignment for both $c$-axis and $a$–$b$ axis. The application of the biaxial alignment method to polycrystalline oxides as presented in this paper establishes a new paradigm for the processing of bulk materials.

• 2006-02-15

著者

• Wang Sheng-qi

  Department Of Biotechnology Beijing Institute Of Radiation Medicine Beijing

• Zhang Jian-zhong

  Department Of Chemistry And Physics And Barnett Institute Northeastern University

• Wang Sheng-Qi

  Department of Chemistry and Barnett Institute, Northeastern University, Boston, MA 02115, U.S.A.

• Bigelow Roberta

  Department of Physics, Willamette University, Salem OR 97301, U.S.A.

• Giessen Bill

  Department of Chemistry and Barnett Institute, Northeastern University, Boston, MA 02115, U.S.A.

• Markiewicz Robert

  Department of Physics and Barnett Institute, Northeastern University, Boston, MA 02115, U.S.A.

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