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Crystal growth and pinning enhancement of directionally melt-textured$(Y_{0.5}Nd_{0.25}Sm_{0.25})Ba_2Cu_3O_y$ oxides in air  

Kim So-Jung (Department of Electrical and Electronic Engineering, Hanzhong University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.15, no.5, 2005 , pp. 188-192 More about this Journal
Abstract
High $T_c(Y_{0.5}Nd_{0.25}Sm_{0.25})Ba_2Cu_3O_y[(YNS)-123]$ superconductors with/without $CeO_2$ additive were systematically investigated by the zone melt growth process in air. Cylindrical green rods of (YNS)-123 oxides were fabricated by cold isostatic pressing (CIP) method using rubber mould. A sample prepared by this method showed well-textured microstructure, and $(Y_{0.5}Nd_{0.25}Sm_{0.25})_2BaCuO_5[(YNS)211]$ nonsuperconducting inclusions were uniformly dispersed in large $(Y_{0.5}Nd_{0.25}Sm_{0.25})Ba_2Cu_3O_y$[(YNS)123] superconducting matrix. In this study, optimum melting temperature and growth rate were $1100^{\circ}C$ and 3 mm/hr, respectively. The directionally melt-textured (YNS)-123 sample with $CeO_2$ additive showed an onset critical temperature $(T_c)\;T_c{\geq}93K$ and sharp superconducting transition.
Keywords
Zone melt growth; CIP;
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1 F. Giovannelli, S. Marinel and I. Monot-Laffez, 'Melt processing of (light rare earth)$Ba_2Cu_3O_y$ materials by the floating zone method', Supercond. Sci. Technol. 15 (2002) 533
2 F. Giovannelli, S. Marinel and I. Monot-Laffez, Properties of the $(Sm_{0.33}Eu_{0.33}Gd_{0.33})Ba_2Cu_3O_y$superconductor prepared by different process in air',' Supercond. Sci. Technol. 16 (2003) 444
3 S.J. Kim, 'Flux pinning enhancement and irreversibility line of Sm doped YBCO superconductor by zone melt growth process', J. KIEEME (Korea) 5 (2004) 81 (in English)
4 M.P. Delamare, M. Hervieu, J. Wang, J. Provot, J. Monot, K. Verbist and G. Van Tendeloo, 'Combination of $CeO_2$ and $PtO_2 $ doping for strong enhancement of $J_c$ under magnetic field in melt-textured superconductor YBaCuO', Physica C 262 (1996) 220
5 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
6 M. Muralidhar, N. Sakai, M. Jirsa and M. Murakami, 'Fabrication and characterization of $LRE_{1+x}Ba_{2_x}Cu_3O_y$ (LRE: Nd, Eu, Gd, NEG) superconductors: a low oxygen partial pressure', Physica C 378 (2002) 646   DOI   ScienceOn
7 C,J. Kim, H.W. Park, K.B. Kim andG.W. Hong, 'New method of producing fine $Y_2BaCuO_5$ in the melt-textured Y-Ba-Cu-O system: attrition milling of $YBa_2Cu_3O_yY_2BaCuO_5$ powder and $CeO_2$   DOI   ScienceOn
8 A. Ubaldini, F. Giovannelli and I. Monot-Laffez, '$(RE_{0.33}Eu_{0.33}Gd_{0.33})$Ba_2CU_3O_y$ bars processed in air', Pysica C 33 (2002) 107
9 P. McGinn, W. Chen, N. Zhu, M. Lanagan and U. Balanchandran, 'Microstructure and critical current density of zone melt textured $YBa_2Cu_3O_{6+x}$ ', Appl. Phys. Lett. 57(14) (1990) 1455   DOI
10 R. Cloots, T. Koutzarova, J..P. Mathieu and M. Ausloos, 'From RE-211 to RE-123. How to control the final microstructure of superconducting single-domains', Supercond. Sci. Technol. 18 (2005). R59
11 P.C. Heieh, S.Y. Chen, I.G. Chen and M.K. Wu, 'Flux pinning at high magnetic field in melt-processed $SmBa_2Cu_3O_7$ with nanocrystalline Sm211/Nd422 additives', Supercond. Sci. Technol. 18 (2005) S111
12 M.R. Koblischka, M. Muralidhar and M. Murakami, 'Flux pinning sites inmelt-processed $(Nd_{0.33}Eu_{0.33}Gd_{0.33})Ba_2Cu_3O_y$ superconductors', Physica C 337 (2000) 31
13 S. Nariki, N. Sakai, M. Murakami and J. Hirabayashi, 'High critical current density in Y-Ba-Cu-O bulk superconductors with very fine Y211 particles', Supercond. Sci. Technol. 17 (2004) S30   DOI   ScienceOn