Effects of Silver and Y_2BaCuO_5 Inclusions on the Transport Current Density and its Anisotropy of Oriented-Grained YBa_2Cu_3O_x/Silver Composites

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概要

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• Transport critical current density (J_<ct>) measurements were performed on bulk oriented-grained YBa_2Cu_3O_x/Silver composites in the presence of a magnetic field (B). J_<ct> of these composites exhibit strong anisotropic behavior when the angle between the applied field and the c-axis of the specimen is varied. Two J_<ct> peaks were observed; a sharp peak centered at B perpendicular to the c-axis and a J_<ct> value roughly 3 times higher than that of the minimum J_<ct> is found. Another broader and weaker perk is found to be centered at B paralle to the c-axis. This anisotropic behavior is detected at all field strengths investigated at 77 K. The effects of Ag as well as Y_2BaCuO_5 (2-1-1) additions on J_<ct> were also investigated. Relatively small amount of randomly distributed normal-phase particles are found to have negligible effect on the J_<ct> anisotropy. The large Ag inclusions are determined to be ineffective pinning centers and J_<ct> decreases with Ag content. The 0.5 to 52 μm size 2-1-1 additions, however, appear to enhance the J_<ct> of the composites.

• 社団法人応用物理学会の論文
• 1992-08-15

著者

• SALAMA Kamel

  Department of Mechanical Engineering and Texas Center for Superconductivity, University of Houston

• Lee D

  Kyungpook National Univ. Taegu Kor

• Lee Dominic

  Texas Center For Superconductivity At University Of Houston Mechanical Engineering Department

• Salama K

  Department Of Mechanical Engineering And Texas Center For Superconductivity University Of Houston

• Salama Kamel

  Texas Center For Superconductivity At University Of Houston Mechanical Engineering Department

• CHAUD Xavier

  Texas Center for Superconductivity and Mechanical Engineering Department, University of Houston

• Chaud Xavier

  Texas Center For Superconductivity And Mechanical Engineering Department University Of Houston:(pres

• LEE Dominic

  Texas Center for Superconductivity and Mechanical Engineering Department, University of Houston

関連論文

• Evidence of Enhanced Flux Pinning by Dislocations in Deformed Textured Y_1Ba_2Cu_3O_x Superconductor
• Critical Current Dependence on Deformation Kinetics in Textured YBa_2Cu_3O_x Superconductor
• Enhancements in Current Density and Mechanical Properties of Y-Ba-Cu-O / Ag Composites
• Effects of Silver and Y_2BaCuO_5 Inclusions on the Transport Current Density and its Anisotropy of Oriented-Grained YBa_2Cu_3O_x/Silver Composites

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