Browse > Article
http://dx.doi.org/10.4313/TEEM.2002.3.2.024

Zone-melting Process of NdBaCuO under Low Oxygen Pressure  

Soh, Dea-Wha (Department of electronic Engineering, Myongji University)
Publication Information
Transactions on Electrical and Electronic Materials / v.3, no.2, 2002 , pp. 24-27 More about this Journal
Abstract
The NdBaCuO superconductor samples were zone-melted in low oxygen partial pressure (1%O$_2$+99%Ar). The zone-melting temperature was decreased about 12$0^{\circ}C$ film 1,06$0^{\circ}C$, the zone-melting temperature in air. Thus the loss of liquid phase (BaCuO$_2$ and CuO) was reduced during: the zone-melting process. The content of non-superconducting phase Nd422 in zone-melted NdBaCuO samples was clearly decreased and, therefore, the substitution of Nd for Ba was occurred. The superconductivity of zone-melted Nd$_{1+x}$Ba$_{2-x}$Cu$_3$O$_{y}$ prepared under low oxygen partial pressure was distinctively improved.d.d.d.
Keywords
NdBaCuO superconductor; Oxygen partial pressure; Zone-melting temperature; Nd422; Superconductivity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 F. Izumi, S. Takekawa, and Y. Matsui, 'Crystal struc-ture of the superconductor $Ba_{1.8}Nd_{1.2}Cu_3O_{7-y}$', Jpn. J. Appl. Phys., Vol. 26, No. 10, p. L 1616, 1987   DOI   ScienceOn
2 Z. Fan, D. Soh, P. Si, Y. Li, and B. Lim, 'Hea treatment Condition for Preparing $Nd_{1+x}Ba_{2-x}Cu_3O_{7-}$ Superconductors', Proc. 2001 Summer Conf. KIEEME, p 624, 2001
3 D. Soh, Z. Fan, H. Kim, W. Gao, and T. Kim 'Preparation of Zone-melted NdBaCuO under Low Oxygen Pressure', Proc. 2001 Autunm Conf. KIEEME, p 85, 2001
4 Z. G. Fan, P. Z. Si, and D. H. Soh, 'Heat treatment o $Nd_{1+x}Ba_{2-x}Cu_3O_{7-\delta}$ superconductors', J. of the Chines Rare Earth Soc., Vol. 19, p. 247, 2001
5 P. Schatzle, G. Ebbing, W. Bieger, and G. Krabbes 'Composition-controlled melt processing o $Nd_{1+x}Ba_{2-x}Cu_3O_{7-\delta}$ based bulk material in air', Physic C, Vol 330, p. 19, 2000   DOI   ScienceOn
6 T. B. Lindemer, E. D. Specht, P. M. Martin, and M. L Flitcroft, "Nonstoichiometry, decomposition and $T_c$ c $Nd_{1-z}Ba_{2-z}Cu_3O_y$', Physica C, Vol. 225, p. 65, 1995
7 Y. Matsui, S. Takekawa, and N. lyi, 'Electron dif&action and microscope study of Ba-Nd-Cu-O superconducting oxides and related compounds', Jpn. J. Appl. Phys., Vol. 26, p. L1693, 1987   DOI   ScienceOn
8 S. I. Yoo, N. Sakai, H. Takaichi, T. Higuchi, and M. Murakami, 'Melt processing for obtaining Nd$Ba_2Cu_3Oy$ superconductors with high Tc and large Jc' Appl. Phys. Lett, Vol. 65, p. 633, 1994   DOI   ScienceOn
9 H. Kojo, S. I. Yoo, and M. Murakami, 'Melt processin of high-$T_c$ Nd-Ba-Cu-O superconductors in air' Physica C, Vol. 289, p. 85,1997   DOI   ScienceOn
10 X. Yao, M. K-ambara, T. Umeda, and Y. Shiohara 'NdBaCuO stoichiometry control (at p $o_2$=0.21) and enhancement of superconductivity', Physica C, Vo 296,p.69, 1998   DOI   ScienceOn