Effect of distribution of powder size on estimation of critical current densities in polycrystalline Sr0.6K0.4Fe2As2 superconductors

被引：0

作者：

Murakami, K.

Mayumi, T.

Kiuchi, M. ^{[4
]}

Otabe, E. S. ^{[1
,4
]}

Matsushita, T.

Ge, J. ^{[2
]}

Ni, B. ^{[2
,4
]}

Wang, L. ^{[3
]}

Qi, Y. ^{[3
]}

Zhang, X. ^{[3
]}

Gao, Z. ^{[3
]}

Ma, Y. ^{[4
]}

机构：

[1] Kyushu Inst Technol, Dept Comp Sci & Elect, Fac Comp Sci & Syst Engn, Iizuka, Fukuoka 8208502, Japan

[2] Fukuoka Inst Technol, Dept Life, Higashi Ku, Fukuoka 8110295, Japan

[3] Chinese Acad Sci, Beijing 100190, Peoples R China

[4] JST, TRIP, Tokyo 1020075, Japan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2011年 / 471卷 / 21-22期

关键词：

As iron-based superconductor; Critical current density; Local and global J(c); Distribution of powder size;

D O I：

10.1016/j.physc.2011.05.087

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of distribution of powder size on the estimation of intra-grain critical current density was investigated for polycrystalline samples of Sr0.6K0.4Fe2As2 with and without addition of Ag 20 wt.%. It turned out that the value of intra-grain critical current density calculated using the average of powder size J(cl) is more overestimated than that calculated taking account of the distribution of powder size J(clp) as the distribution of powder size is widened, since the magnetic moment drastically increases due to the larger contribution from larger particles. From the distribution of powder size obtained by the microscopic observation using SEM, the factor of overestimation of J(cl)/J(clp) is found to be larger than two in both samples. Moreover, the distribution of powder size in the Ag-added sample is found to be smaller than that of pure sample. Therefore, the factor of overestimation of J(cl) is considered to be smaller in the Ag-added sample. It is recommended to take account of the distribution of powder size for precise estimation of intra-grain critical current density. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：912 / 915

页数：4

共 8 条

[1] Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with Tc=26 K
Kamihara, Yoichi
Watanabe, Takumi
Hirano, Masahiro
Hosono, Hideo
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (11) : 3296 - +
[2] Single crystals of LnFeAsO1-xFx (Ln = La, Pr, Nd, Sm, Gd) and Ba1-xRbxFe2As2: Growth, structure and superconducting properties
Karpinski, J.
Zhigadlo, N. D.
Katrych, S.
Bukowski, Z.
Moll, P.
Weyeneth, S.
Keller, H.
Puzniak, R.
Tortello, M.
Daghero, D.
Gonnelli, R.
Maggio-Aprile, I.
Fasano, Y.
Fischer, O.
Rogacki, K.
Batlogg, B.
[J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2009, 469 (9-12): : 370 - 380
[3] Simple One-Step Synthesis and Superconducting Properties of SmFeAsO1-xFx
Ma Yan-Wei
Gao Zhao-Shun
Wang Lei
Qi Yan-Peng
Wang Dong-Liang
Zhang Xian-Ping
[J]. CHINESE PHYSICS LETTERS, 2009, 26 (03)
[4] Global and local critical current density in superconducting SmFeAsO1-xFx measured by two methods
Otabe, E. S.
Kiuchi, M.
Kawai, S.
Morita, Y.
Ge, J.
Ni, B.
Gao, Z.
Wang, L.
Qi, Y.
Zhang, X.
Ma, Y.
[J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2009, 469 (21): : 1940 - 1944
[5] Superconductivity at 55 K in iron-based F-doped layered quaternary compound Sm[O1-xFx] FeAs
National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, China
[J]. Chin. Phys. Lett., 2008, 6 (2215-2216): : 2215 - 2216
[6] WANG L, 2009, CONDMATARXIV09043145
[7] Evidence for two distinct scales of current flow in polycrystalline Sm and Nd iron oxypnictides
Yamamoto, A.
Polyanskii, A. A.
Jiang, J.
Kametani, F.
Tarantini, C.
Hunte, F.
Jaroszynski, J.
Hellstrom, E. E.
Lee, P. J.
Gurevich, A.
Larbalestier, D. C.
Ren, Z. A.
Yang, J.
Dong, X. L.
Lu, W.
Zhao, Z. X.
[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2008, 21 (09)
[8] Critical current density properties in polycrystalline Sr0.6K0.4Fe2As2 superconductors
Yoshida, N.
Kiuchi, M.
Otabe, E. S.
Matsushita, T.
Ge, J.
Ni, B.
Wang, L.
Qi, Y.
Zhang, X.
Gao, Z.
Ma, Y.
[J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2010, 470 (20): : 1216 - 1218

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