Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
권호 표지

Grain growth and superconducting properties of melt-processed (Y-Sm-Nd)-Ba-Cu-O composite oxides

  • Kim, So-Jung (Department of Electrical and Electronic Engineering, Hanzhong University)
  • Published : 2005.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

[ $(Y_{0.5}Sm_{0.25}Nd_{0.25})Ba_2Cu_3O_y$ ] [(YSN)-123] high $T_c$ composite superconductors with $CeO_2$ addition were systematically investigated by top seeded melt growth (TSMG) process in air atmosphere. A melt textured $NdBa_2Cu_3O_y$ (Nd-123) single crystal was used as a seed for achieving the c-axis alignment large grains perpendicular to the surface of (YSN)-123 composite oxides. The size of $(Y_{0.5}Sm_{0.25}Nd_{0.25})_2BaCuO_5$ [(YSN)211] nonsuperconducting inclusions of the melt textured (YSN)-123 samples with $CeO_2$ addition were remarkably reduced and uniformly distributed within the (YSN)123 superconducting matrix except in the region very close to the Nd-123 seed crystal. The sample showed a sharp superconducting transition of 91 K.

Keywords

References

  1. C. Harnois,. 'Attempts and success in texturing large single domams of cerium and silver doped $YBa_2Cu_3O_y$ Supercond. Sci. Technol. 15 (2002) 864 https://doi.org/10.1088/0953-2048/15/6/304
  2. S. Nariki, N. Sakai, M. Murakami and I. Hirabayashi 'High critical current density in Y-Ba-Cu-O bulk superconductors with very fine Y211 particles', Supercond. Sci. Technol. 17 (2004) S30 https://doi.org/10.1088/0953-2048/17/2/057
  3. S.J. Kim, K.W. Lee and H.G. Kim, 'Characterization and superconducting properties of (Sm/Y)-Ba-Cu-O composite oxides by top-seeded melt growth in air', J. Crystal Growth 204 (1999) 78
  4. M. Muralidhar, M. Jirsa, N. Sakai and M. Murakami 'Progress in melt-processed (Nd-Sm-Gd)$Ba_2Cu_3O_y$ superconductors', Supercond. Sci. Technol. 16 (2003) 'Rl
  5. M. Murakami, N. Sakai, T. Higuchi and S.I. Yoo, 'Melt-processed light rare earth element-Ba-Cu-O' Supercond. Sci. Technol. 9 (1996) 1015 https://doi.org/10.1088/0953-2048/9/12/001
  6. S. Awaji, N. Isono, K. Watanabe, M. Muralidhar, M. Murakami, N. Koshizuka and K. Noto, 'High magnetic field transport properties of (Nd, Eu, Gd)$Ba_2Cu_3O_x$bulk', Supercond. Sci. Technol' 17 (2004) S6
  7. M. Muralidhar, N. Sakai, M. Jirsa and M. Murakami, 'Fabrication and characterization of TEX>$LRE_{1+x}Ba_{2-x}Cu_3O_y$ (LRE: Nd, Eu, Gd, NEG) superconductors: a low oxygen partial pressure, Physica C 378 (2002) 646 https://doi.org/10.1016/S0921-4534(02)01513-7
  8. D.N. Matthews, J.W. Cochrane and G.J. Russell, 'Melt-textured growth and characterization of a (Nd/Y)$Ba_2Cu_3O_{7-y}$ composite superconductor with very high critical current density', Physica C 249 (1995) 255 https://doi.org/10.1016/0921-4534(95)00295-2
  9. P. Schatzle, W. Bieger, U. Wiesner, P. Verges and G. Krabbes, 'Melt processing of (Nd, Y)BaCuO and (Sm,Y)BaCuO composites', Supercond. Sci. Technol. 9 (1996) 869 https://doi.org/10.1088/0953-2048/9/10/007
  10. M. Kambara, N. Hari Babu, D.A. Cardwell and A.M. Campbell, 'Solidification path of $Y_xNd_{l_x+y}Ba_{2_y}Cu_3O_{6+{\delta}} $ superconducting composites', Supercond. Sci. Technol. 16 (2003) 1286 https://doi.org/10.1088/0953-2048/16/11/006
  11. C.J. Kim, H.W. Park, K.B. Kim and G.W. Hong, 'New method of producing fine $Y_2BaCuO_5$ in the melt-textured Y-Ba-Cu-O system: attrition milling of $YBa_2Cu_3O_y$ - $Y_2BaCuO_5$powder and $CeO_2$ addition prior to melting', Supercond. Sci. Technol. 8 (1995) 652