Effect of Post-Heat Treatment on the Critical Current Density of NbAl Superconductor

Li, Ping-yuan; Zhang, Xiao-lan; Yang, Da-wei; Yang, Su-hua; Pan, Xi-feng; Yan, Guo; Zhang, Yong; Feng, Yong; Zhao, Yong
June 2015
Journal of Superconductivity & Novel Magnetism;Jun2015, Vol. 28 Issue 6, p1719
Academic Journal
The achievement of stoichiometry is very important for NbAl superconductor with excellent properties. A rapid heating, quenching, and transformation method is efficient to achieve stoichiometric NbAl superconducting wires, and supersaturated solid solution phase was transformed to NbAl in the transformation process with a post-annealing temperature between 800° to 900 °C and for 10 h. X-ray diffraction analysis revealed that the NbAl wires were of pure NbAl phase with a superconducting transition temperature about 18 K. Experimental results further showed that superconducting transition width was narrowed by quenching process after post-annealing. For the typical samples, the H( T) was determined from the onset transitions of the M- Tcurves under various applied fields and the H(0) value was extrapolated to be about 35 T. A significantly high J value under a magnetic field up to 9 T and at 8 K was observed. The pinning behavior of the NbAl wires was also discussed.


Related Articles

  • The Effect of Anisotropy of H on Transport Current in Silicone Oil-Doped MgB Superconductor. Ghorbani, S.; Fahimi, M. // Journal of Superconductivity & Novel Magnetism;Jun2015, Vol. 28 Issue 6, p1737 

    The temperature and magnetic field dependences of the critical current density in silicone oil-doped MgB polycrystalline samples have been investigated by magnetic measurements. The upper critical magnetic field anisotropy, $\gamma =H_{\mathrm {c}2}^{\bot \mathrm {c}}/H_{\mathrm {c}2}^{\vert...

  • Fluctuation of mean free path and transition temperature induced vortex pinning in (Ba,K)Fe2As2 superconductors. Ghorbani, S. R.; Wang, X. L.; Shahbazi, M.; Dou, S. X.; Lin, C.T. // Applied Physics Letters;5/21/2012, Vol. 100 Issue 21, p212601 

    The vortex pinning mechanisms of Ba0.72K0.28Fe2As2 single crystal have been studied systematically as a function of temperature and magnetic field. The temperature dependence of the critical current density, Jc(T), was analysed within the collective pinning model at different magnetic fields. It...

  • Improvement of YBCO Superconductor Magnetic Shielding by Using Multiple Bulks. Douine, B.; Male, G.; Lubin, T.; Mezani, S.; Leveque, J.; Berger, K. // Journal of Superconductivity & Novel Magnetism;Apr2014, Vol. 27 Issue 4, p903 

    HTS bulks present a high critical current density which can be used as magnetic shields. Previous works showed that BSCCO bulks can screen magnetic fields up to 0.1 T. For large scale applications like electrical machines, stronger magnetic field is usually needed. In so doing, (RE)BCO materials...

  • Modeling of Critical Current Density of Bulk High Tc Superconductors. SANTOSH, M. // Acta Physica Polonica, A.;Sep2014, Vol. 126 Issue 3, p808 

    Magnetic field dependence of critical current density (Jc) of ErBa2Cu3Oy thick film "Er-123" and melt textured GdBa2Cu3Oy bulk "Gd-123" at liquid nitrogen temperature is reported. Gd-123 exhibits a usual peak effect at magnetic fields around 2 T, while Jc of the Er-123 thick film continuously...

  • Variation of c-axis correlation on vortex pinning by ab-plane non-superconducting layers in YBa2Cu3O7 films. Horide, Tomoya; Murayama, Takuto; Takata, Kaoru; Matsumoto, Kaname; Mele, Paolo; Yoshida, Yutaka; Ichino, Yusuke; Awaji, Satoshi // Journal of Applied Physics;Aug2013, Vol. 114 Issue 7, p073903 

    In YBa2Cu3O7 (YBCO) + BaSnO3 (BSO)/PrBa2Cu3O7 (PrBCO) multilayer films, behavior of vortices pinned by BSO nanorods was evaluated to discuss influence of ab-plane non-superconducting layers on c-axis correlated vortex pinning. Critical current density (Jc) and activation energy for thermally...

  • High magnetic field transport properties of liquid quenched Nb3Al and Nb3Al(Si,Ge) superconducting compounds. Clemente, G.; Habbal, F.; Turnbull, D.; Bevk, J. // Applied Physics Letters;9/15/1985, Vol. 47 Issue 6, p640 

    Critical current behavior and intrinsic superconducting properties of liquid quenched Nb3Al and its pseudobinaries Nb3 (Al,Si) and Nb3(Al,Ge) have been studied in fields up to 29 T. Our results show that flux pinning in these materials is dominated by strong precipitate pinning at low...

  • Fabrication of sections of a NbSn-based rigid superconducting cable. Kolosov, V.; Shevyrev, A. // Inorganic Materials;Apr2012, Vol. 48 Issue 4, p337 

    Using NbSn layers deposited onto the outer and inner surfaces of copper tubes 30 and 50 mm in diameter, we have fabricated sections of a rigid superconducting coaxial cable up to 1 m in length. The highest current-carrying capacity of the cable at 4.2 K was 800-850 A/mm, which corresponded to a...

  • Microscopic neutron investigation of the Abrikosov state of high-temperature superconductors. Johan Juul Chang; Mesot, Joel // Pramana: Journal of Physics;Oct2008, Vol. 71 Issue 4, p679 

    Using small angle neutron scattering we have been able to observe for the first time a well-defined vortex lattice (VL) structure both in the hole-doped LSCO and electron-doped NCCO superconductors. Our measurements on optimally doped LSCO reveal the existence of a magnetic field-induced phase...

  • Results of Measuring the Influence of Casimir Energy on Superconducting Phase Transitions. Allocca, Annalisa; Bimonte, Giuseppe; Born, Detlef; Calloni, Enrico; Esposito, Giampiero; Huebner, Uwe; Il'ichev, Evgeni; Rosa, Luigi; Tafuri, Francesco // Journal of Superconductivity & Novel Magnetism;Dec2012, Vol. 25 Issue 8, p2557 

    The ALADIN experiment aims at observing how the critical magnetic field of a superconducting aluminum film is modified, when it constitutes one of the reflecting surfaces of a Casimir cavity. If successful, such an observation would reveal the influence of vacuum energy on the superconducting...


Read the Article


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

Try another library?
Sign out of this library

Other Topics