Magnetic relaxation and lower critical field in MgB2 wires

被引：3
|
作者：
Feng, Y. [1 ]
Yan, G. [1 ]
Zhao, Y. [2 ]
Pradhan, A.K. [3 ]
Liu, C.F. [1 ]
Zhang, P.X. [1 ]
Zhou, L. [1 ]
机构：
[1] Northwest Inst Nonferrous Metal Res, PO Box 51, Xi'an 710016, China
[2] School of Materials Sci. and Eng., University of New South Wales, Sydney, NSW 2052, Australia
[3] Jesse W Beams Laboratory, University of Virginia, Charlottesville, VA 22901, United States
来源：
| 2003年 / Institute of Physics Publishing卷 / 15期
关键词：
Critical current density (superconductivity) - High temperature superconductors - Magnetic relaxation - Superconducting transition temperature;
D O I：
10.1088/0953-8984/15/37/007
中图分类号：
学科分类号：
摘要：
Magnetic relaxation behaviour, critical current density Jc and lower critical field Hc1 have been investigated in MgB2/Ta/Cu wires. It is found that Jc and Hc1 decrease linearly with temperature in the whole temperature region below Tc. The relaxation rate is very small and has a weak temperature dependence compared to high-Tc superconductors. Also, the pinning potential is much larger and the temperature and field dependences of the pinning potential are briefly discussed.
引用
收藏
相关论文
共 50 条
  • [41] Experimental research on electric field jump in low magnetic fields: Detection of damage in new ex-situ MgB2 barriers in MgB2 wires
    Gajda, D.
    Morawski, A.
    Zaleski, A.
    Hossain, M. S. A.
    Rindfleisch, M.
    Cetner, T.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 647 : 303 - 309
  • [42] Large upper critical field and irreversibility field in MgB2 wires with SiC additions -: art. no. 092507
    Sumption, MD
    Bhatia, M
    Rindfleisch, M
    Tomsic, M
    Soltanian, S
    Dou, SX
    Collings, EW
    APPLIED PHYSICS LETTERS, 2005, 86 (09) : 1 - 3
  • [43] Investigation of the Upper Critical Magnetic Field and Activation Energy in MgB2 Thin Film
    Koparan, E. Taylan
    Surdu, A.
    Sidorenko, A.
    Yanmaz, E.
    JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2012, 25 (07) : 2235 - 2238
  • [44] Investigation of the Upper Critical Magnetic Field and Activation Energy in MgB2 Thin Film
    E. Taylan Koparan
    A. Surdu
    A. Sidorenko
    E. Yanmaz
    Journal of Superconductivity and Novel Magnetism, 2012, 25 : 2235 - 2238
  • [45] Critical current density defined at low electric field criterion and energy margin of superconducting MgB2 wires in wide temperature and magnetic field range
    Kodama, Motomune
    Kotaki, Hiroshi
    Suzuki, Takaaki
    Tanaka, Hideki
    SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2021, 34 (02):
  • [46] Enhancement of lower critical field by reducing the thickness of epitaxial and polycrystalline MgB2 thin films
    Tan, Teng
    Wolak, M. A.
    Acharya, Narendra
    Krick, Alex
    Lang, Andrew C.
    Sloppy, Jennifer
    Taheri, Mitra L.
    Civale, L.
    Chen, Ke
    Xi, X. X.
    APL MATERIALS, 2015, 3 (04):
  • [47] Linear temperature dependence of lower critical field in MgB2 -: art. no. 094522
    Li, SL
    Wen, HH
    Zhao, ZW
    Ni, YM
    Ren, ZA
    Che, GC
    Yang, HP
    Liu, ZY
    Zhao, ZX
    PHYSICAL REVIEW B, 2001, 64 (09)
  • [48] Microstructure-critical current density model for MgB2 wires and tapes
    Birajdar, B.
    Eibl, O.
    Journal of Applied Physics, 2009, 105 (03):
  • [49] Relaxation Phenomena in a Long MgB2 Tube Subjected to Transverse Magnetic Field, at 4.2 K
    Giunchi, Giovanni
    Barna, Daniel
    Bajas, Hugues
    Brunner, Kristof
    Nemet, A.
    Petrone, Carlo
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2018, 28 (04)
  • [50] Magnetic Field Trapping in MgB2 Bulks and Inserts
    Perini, Elena
    Giunchi, Giovanni
    Saglietti, Luca
    Albisetti, Alessandro Figini
    Matrone, Antonio
    Cavaliere, Vincenzo
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2011, 21 (03) : 2690 - 2693
12345