TITLE

Critical current densities of powder-in-tube MgB[sub 2] tapes fabricated with nanometer-size Mg powder

AUTHOR(S)
Yamada, H.; Hirakawa, M.; Kumakura, H.; Matsumoto, A.; Kitaguchi, H.
PUB. DATE
March 2004
SOURCE
Applied Physics Letters;3/8/2004, Vol. 84 Issue 10, p1728
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We fabricated powder-in-tube MgB[sub 2]/Fe tapes using a powder mixture of nanometer-size Mg and commercial amorphous B and investigated the transport properties. High-purity nanometer-size Mg powder was fabricated by applying the thermal plasma method. 5–10 mol % SiC powder doping was tried to enhance the J[sub c] properties. We found that the use of nanometer-size Mg powder was effective to increase the J[sub c] values. The transport J[sub c] values of the nondoped and 10 mol % SiC-doped tapes prepared with nanometer-size Mg powder reached 90 and 250 A/mm2 at 4.2 K and 10 T, respectively. These values were about five times higher than those of the tapes prepared with commercial Mg powder. © 2004 American Institute of Physics.
ACCESSION #
12405707

 

Related Articles

  • Influence of Nanostructural Inhomogeneities on Superconducting Characteristics of MgB. Prikhna, T.; Eisterer, M.; Gencer, A.; Weber, H.; Gawalek, W.; Akdogan, M.; Kovylaev, V.; Moshchil, V.; Kozyrev, A.; Karpets, M.; Sverdun, V.; Tkach, V.; Basyuk, T.; Shaternik, A. // Journal of Superconductivity & Novel Magnetism;Feb2015, Vol. 28 Issue 2, p525 

    The distribution of nanostructural inhomogeneities, such as areas with high concentration of B and impurity O, plays one of the key roles on the variation of the critical current density, j, of MgB materials. The effect of O and B redistribution can be enhanced by Ti addition and thus leads to...

  • Role of Mg-B-O Nanostructural Inhomogenities On the Performance of Superconducting MgB2. Tatiana, PRIKHNA; Michael, EISTERER; Wolfgang, GAWALEK; Vladimir, SOKOLOVSKY; Artem, KOZYREV; Victor, MOSHCHIL; Harald, W. WEBER; Sergey, DUB; Xavier, CHAUD; Valeriy, KOVYLAEV; Vladimir, SVERDUN; Myroslav, KARPETS; Tatiana, BASYUK; Nina, SERGIENKO; Tatiana, SERBENYUK // Advances in Science & Technology;2014, Vol. 95, p156 

    Auger and SEM studies show that with increasing of MgB2 manufacturing temperature from 600÷800 °C to 1050÷1100 °C the Mg-B-O nano-layers which are present in the MgB2 matrix transform into distinct dispersed Mg-B-O inclusions. On the other hand the sizes of inclusions of higher...

  • Superconducting Properties of In-situ PIT MgB2 Tapes with Different Ceramic Powder. Yamada, Y.; Nakatsuka, M.; Kato, Y.; Tachikawa, K.; Kumakura, H. // AIP Conference Proceedings;2006, Vol. 824 Issue 1, p631 

    Powder-in-tube PIT MgB2 tapes have been prepared through an in-situ process using a steel sheath. Magnesium hydride MgH2 and amorphous boron powders were mixed to synthesize MgB2 superconductor. The mixed powder was encased in a steel tube and rolled into a monocore tape of about 5mm in width...

  • Improved upper critical field in bulk-form magnesium diboride by mechanical alloying with carbon. Senkowicz, B. J.; Giencke, J. E.; Patnaik, S.; Eom, C. B.; Hellstrom, E. E.; Larbalestier, D. C. // Applied Physics Letters;5/16/2005, Vol. 86 Issue 20, p202502 

    High-energy milling of magnesium diboride (MgB2) prereacted powder renders the material largely amorphous through extreme mechanical deformation and is suitable for mechanically alloying MgB2 with dopants including carbon. Bulk samples of milled carbon and MgB2 powders subjected to hot isostatic...

  • BENDING EFFECTS ON CRITICAL CURRENTS OF Nb3Sn SUPERCONDUCTING WIRES. Takayasu, M.; Chiesa, L.; Schultz, J. H.; Minervini, J. V. // AIP Conference Proceedings;4/8/2010, Vol. 1219 Issue 1, p239 

    Bending effects on Nb3Sn wires have been investigated to understand the critical current degradation of large Nb3Sn superconducting cables. An integrated model taking into account the neutral axis shift, the current transfer length, the mechanical filament breakage and the uniaxial strain...

  • A comparative study on field, temperature, and strain dependences of the critical current for doped and undoped MgB2 wires based on the percolation model. Oh, Sangjun; Kim, J. H.; Cho, Kyuhwan; Lee, Chulhee; Kim, Chan-Joong; Dou, S. X.; Rindfleisch, M.; Tomsic, M.; Ahn, Jung-Ho // Journal of Applied Physics;Sep2009, Vol. 106 Issue 6, p063912-1 

    Field, temperature, and strain dependences of the critical current for a SiC doped multifilamentary in situ MgB2 wire have been studied. Measurement results were compared with that of the undoped wire, and the origin of the difference in the critical current is discussed. The critical current...

  • Fabrication and Properties of Coated Conductors with All Fluorine-Free CSD Route. Zhao, Y.; Pu, M. H.; Wang, W. T.; Lei, M.; Cheng, C. H.; Zhang, H. // Journal of Superconductivity & Novel Magnetism;Aug2010, Vol. 23 Issue 6, p971 

    A fluorine-free chemical solution deposition (CSD) method has been developed to fabricate YBCO epitaxial films and SmBiO3 or Sm-doped CeO2 (SCO) buffer layers on crystal substrates and textured Ni5%W metal substrates. The critical current density, J c, is over 4 MA/cm2 for YBCO deposited on...

  • Current amplification in high-temperature superconductor current injection three-terminal devices. O. Morán, J. P.; R. Hoff, J. P.; R. Schneider; H. Wühl, J. P.; J. Haibritter, J. P. // Journal of Applied Physics;11/15/2003, Vol. 94 Issue 10, p6667 

    Current injection into superconducting microbridges has been studied for state-of-the-art YBa[sub 2]Cu[sub 3]O[sub 7-x]/SrTiO[sub 3]/Au (YBCO/STO/Au) planar heterostructures based on c-axis oriented YBCO layers. By injecting a gate current I[sub g] into the YBCO channel of these three-terminal...

  • Reduction of intrinsic critical current density for current-induced domain wall motion by using a ferrimagnetic nanowire with perpendicular magnetic anisotropy. Komine, T.; Takahashi, K.; Ooba, A.; Sugita, R. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07D503 

    We herein discuss the use of a ferrimagnetic nanowire for current-induced domain wall motion in order to satisfy both high perpendicular anisotropy and low saturation magnetization. We demonstrate the current-induced domain wall motion in magnetic nanowires with various saturation magnetizations...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics