Critical current density of SmBCO coated conductor on IBAD-MgO substrate fabricated by co-evaporation

被引：15
作者：
Ha, H. S.
Kim, H. S.
Yang, J. S.
Jung, Y. H.
Ko, R. K.
Song, K. J.
Ha, D. W.
Oh, S. S.
Kirn, H. K.
Yoo, K. K.
Yoo, S. I.
Park, C.
Youm, D. J.
Moon, S. H.
Joo, J. H.
机构：
[1] Korea Electrotechnol Res Inst, Superconducting Mat Grp, Gyeongnam 641120, South Korea
[2] Sungkyunkwan Univ, Adv Mat Sci & Engn, Changan Ku, Suwon 440746, South Korea
[3] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea
[4] SuNam Co Ltd, Anyang 151744, South Korea
[5] Seoul Natl Univ, Sch Mat Sci & Engn, Anyang 151744, South Korea
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2007年 / 463卷
关键词：
SmBCO; coated conductor; IBAD-MgO; co-evaporation;
D O I：
10.1016/j.physc.2007.01.039
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have fabricated SmBCO coated conductor on IBAD-MgO substrates using unique co-evaporation method. The batch type co-deposition system was specially designed and was named EDDC (evaporation using drum in dual chamber) that is possible to deposit superconducting layer with optimum composition ratio of materials at temperature over 700 degrees C and several mTorr of oxygen. In this study, we have investigated the influence of SmBCO phase composition ratio on the critical current density of coated conductor. We have optimized the composition ratio by changing the deposition rates of Ba and Cu during co-evaporation for better critical current density. A higher critical current density was measured at the composition ratio of Ba deficiency (1.9-2.0) and Cu rich (3.2-3.4) compared to the Sm1Ba2Cu3Oy , stoichiometry. Especially, highest critical current density of 2.6 MA/cm(2) was measured at the composition of Sm1Ba1.9Cu3.2Oy that has dense surface morphology. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：493 / 496
页数：4
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