Additional effect of Ag and 211 phase on thermal expansion of REBaCuO bulk superconductor (RE=Sm, Y)

✍ Scribed by H. Fujishiro; M. Ikebe; S. Kohayashi; K. Noto; K. Yokoyama

• Book ID: 104112353
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 333 KB
• Volume: 43
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(03)00124-3

✦ Synopsis

The anisotropic thermal expansion DL=L was examined for melt-processed REBaCuO(Ag) bulk composites (RE ¼ Sm, Y) as functions of not only the contents of the RE 2 BaCuO 5 second phase but also Ag metal added to the highly oriented REBa 2 Cu 3 O 7 matrix. The DL=Lj c values in the c-direction of REBaCuO(Ag) bulks are about 1.5-1.8 times as large as the DL=Lj ab values in the abplane. DL=L increases with increasing Ag content in both directions but DL=Lj c is by far more sensitive to the Ag content. The resultant compressive strain due to Ag particles in the c-direction through the melt-processing was estimated and its possible contribution for the improvement of the superconducting characteristics of the matrix was discussed.