Low-temperature synthesis of FeTe0.5Se0.5 polycrystals with a high transport critical current density

被引：41
作者：
Ding, Qing-Ping [1 ,2 ]
Mohan, Shyam [1 ]
Tsuchiya, Yuji [1 ]
Taen, Toshihiro [1 ]
Nakajima, Yasuyuki [1 ,2 ]
Tamegai, Tsuyoshi [1 ,2 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[2] JST, Transformat Res Project Iron Pnictides, Bunkyo Ku, Tokyo 1138656, Japan
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2011年 / 24卷 / 07期
关键词：
MAGNETIC PHASE-DIAGRAM; SUPERCONDUCTIVITY;
D O I：
10.1088/0953-2048/24/7/075025
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have prepared high-quality polycrystalline FeTe0.5Se0.5 at temperature as low as 550 degrees C. The transport critical current density evaluated from the current-voltage characteristics is over 700 A cm(-2) at 4.2 K under zero field, which is several times larger than that for FeTe0.5Se0.5 superconducting wires. The critical current density estimated from magneto-optical images of flux penetration is also similar to this value. The upper critical field of the polycrystalline FeTe0.5Se0.5 at T = 0 K estimated using Werthamer-Helfand-Hohenberg theory is 585 kOe, which is comparable to that of single crystals. This study gives some insight into how to improve the performance of FeTe0.5Se0.5 superconducting wires.
引用
收藏
页数：6
相关论文
共 42 条
  • [1] AWANA S, 2010, J APPL PHYS, V107, pE9128
  • [2] MAGNETIZATION OF HIGH-FIELD SUPERCONDUCTORS
    BEAN, CP
    [J]. REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) : 31 - +
  • [3] Evidence for Anisotropic Vortex Dynamics and Pauli Limitation in the Upper Critical Field of FeSe1-xTex
    Braithwaite, Daniel
    Lapertot, Gerard
    Knafo, William
    Sheikin, Ilya
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2010, 79 (05)
  • [4] Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO1-xFxFeAs
    Chen, G. F.
    Li, Z.
    Wu, D.
    Li, G.
    Hu, W. Z.
    Dong, J.
    Zheng, P.
    Luo, J. L.
    Wang, N. L.
    [J]. PHYSICAL REVIEW LETTERS, 2008, 100 (24)
  • [5] Superconductivity at 36 K in gadolinium-arsenide oxides GdO1-xFxFeAs
    Cheng Peng
    Fang Lei
    Yang Huan
    Zhu XiYu
    Mu Gang
    Luo HuiQian
    Wang ZhaoSheng
    Wen HaiHu
    [J]. SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY, 2008, 51 (06): : 719 - 722
  • [6] Origin of weak-link behavior of grain boundaries in superconducting cuprates and pnictides
    Deutscher, Guy
    [J]. APPLIED PHYSICS LETTERS, 2010, 96 (12)
  • [7] Magneto-optical imaging of polycrystalline FeTe1-xSex prepared at various conditions
    Ding, Q.
    Taen, T.
    Mohan, S.
    Nakajima, Y.
    Tamegai, T.
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2011, 471 (21-22): : 651 - 655
  • [8] Superconductivity in the iron selenide KxFe2Se2 (0 ≤x≤1.0)
    Guo, Jiangang
    Jin, Shifeng
    Wang, Gang
    Wang, Shunchong
    Zhu, Kaixing
    Zhou, Tingting
    He, Meng
    Chen, Xiaolong
    [J]. PHYSICAL REVIEW B, 2010, 82 (18):
  • [9] Very high upper critical fields in MgB2 produced by selective tuning of impurity scattering
    Gurevich, A
    Patnaik, S
    Braccini, V
    Kim, KH
    Mielke, C
    Song, X
    Cooley, LD
    Bu, SD
    Kim, DM
    Choi, JH
    Belenky, LJ
    Giencke, J
    Lee, MK
    Tian, W
    Pan, XQ
    Siri, A
    Hellstrom, EE
    Eom, CB
    Larbalestier, DC
    [J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (02) : 278 - 286
  • [10] Superconductivity in the PbO-type structure α-FeSe
    Hsu, Fong-Chi
    Luo, Jiu-Yong
    Yeh, Kuo-Wei
    Chen, Ta-Kun
    Huang, Tzu-Wen
    Wu, Phillip M.
    Lee, Yong-Chi
    Huang, Yi-Lin
    Chu, Yan-Yi
    Yan, Der-Chung
    Wu, Maw-Kuen
    [J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2008, 105 (38) : 14262 - 14264
12345