TITLE

Improvement of critical current density in MgB[sub 2] superconductors by Zr doping at ambient pressure

AUTHOR(S)
Feng, Y.; Zhao, Y.; Sun, Y. P.; Liu, F. C.; Fu, B. Q.; Zhou, L.; Cheng, C. H.; Koshizuka, N.; Murakami, M.
PUB. DATE
December 2001
SOURCE
Applied Physics Letters;12/10/2001, Vol. 79 Issue 24, p3983
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present the superconducting properties and phase compositions of Mg[sub 1-x]Zr[sub x]B[sub 2] bulk samples fabricated by a solid-state reaction at ambient pressure. It is found that a small amount of Zr atoms may be introduced into the lattice of MgB[sub 2], while the majority of them forms ZrB[sub 2] phase. The Mg[sub 0.9]Zr[sub 0.1]B[sub 2] sample shows the highest J[sub C] of 2.1 x 10[sup 6] A/cm[sup 2] in 0.56 T at 5 K and 1.83 x 10[sup 6] A/cm[sup 2] in self-field at 20 K, higher irreversibility field and larger upper critical field in MgB[sub 2] bulk samples. The combination of good grain connection, the reduction of grain size and small ZrB[sub 2] particles in the sample may be responsible for the significant enhancement of J[sub C] in Zr-doped samples. This technique has a great potential to prepare high performance MgB[sub 2] bulk samples and wires on an industrial scale.
ACCESSION #
5643396

 

Related Articles

  • Fabrication of the Bi1Sr1Ca1Cu2Ox high Tc superconductor. Garland, M. M. // Applied Physics Letters;5/30/1988, Vol. 52 Issue 22, p1913 

    The high Tc superconductor Bi1Sr1Ca1Cu2Ox has been fabricated from a solid-state reaction of SrCO3, CaCO3, Cu2O, and Bi. The onset temperature is found to be 120 K. A second phase is present with an onset of 90 K. Both phases are observed in ac susceptibility and resistance data. This compound...

  • Preparation and critical current density of a Bi-based superconducting whisker composite. Funahashi, Ryoji; Matsubara, Ichiro; Kusumi, Shinji; Ogura, Toru; Yamashita, Hiroshi; Dimesso, Lucangelo // Journal of Applied Physics;10/15/1994, Vol. 76 Issue 8, p4891 

    Presents information on a study that prepared a bismuth-based superconducting whisker composite. Preparation procedure for the composite; Estimation on the degree of alignment in the samples.

  • Cation intermixing and ordering phenomenon in M–O layer of MSr[sub 2]YCu[sub 2]O[sub z] (M-1212) compounds with M=Fe, Co, Al, and Ga: A neutron powder diffraction study. Awana, V. P. S.; Takayama-Muromachi, E.; Malik, S. K.; Yelon, W. B.; Karppinen, M.; Yamauchi, H.; Krishnamurthy, V. V. // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p8221 

    Various MSr[SUB2]Ycu[SUB2]O[SUBz] (M-1212 with M = Fe, Co, Al, and Ga) compounds have been synthesized through a solid-state reaction route. All these compounds are derived from the basic CuBa[SUB2]Ycu[SUB2]O[SUB7-δ] structure. Rietveld structural refinement of the room-temperature neutron...

  • Suppression of superconductivity in Nb by IrMn in IrMn/Nb bilayers. Wu, B. L.; Yang, Y. M.; Guo, Z. B.; Wu, Y. H.; Qiu, J. J. // Applied Physics Letters;10/7/2013, Vol. 103 Issue 15, p152602 

    Effect of antiferromagnet on superconductivity has been investigated in IrMn/Nb bilayers. Significant suppression of both transition temperature (Tc) and lower critical field (Hc1) of Nb is found in IrMn/Nb bilayers as compared to a single layer Nb of same thickness; the suppression effect is...

  • Origin of weak-link behavior of grain boundaries in superconducting cuprates and pnictides. Deutscher, Guy // Applied Physics Letters;3/22/2010, Vol. 96 Issue 12, p122502 

    Superconducting cuprates and pnictides composed of CuO2 or AsFe planes, respectively, with intercalated insulating layers, are at the crossroads of three families of crystalline solids: Metals, doped Mott insulators, and ferroelectrics. The metallic and doped insulator approaches to high...

  • Time-Reversal symmetry violation and the structure of the superconducting order parameter of PrOs4Sb12. Yarzhemsky, V. G.; Nefedov, V. I. // Physics of the Solid State;Mar2009, Vol. 51 Issue 3, p448 

    The antisymmetric two-electron wave functions corresponding to the symmetry of Cooper pairs are constructed for the symmetry group T h of the PrOs4Sb12 superconductor and its subgroup D2 h. The dependence of the structure of these functions (the presence of point nodes) on the group of the wave...

  • Superconducting, Magnetic and Transport Properties of RuSr2R1.4Ce0.6Cu2O10-δ (R = Eu, Sm). Balchev, N.; Nenkov, K.; Mihova, G.; Pirov, J. // AIP Conference Proceedings;2007, Vol. 899 Issue 1, p584 

    The article examines the superconducting, magnetic and transport properties of RuSr2R1.4Ce0.6Cu2O10-δ (R =Eu,Sm). It discusses how the samples of RuSr2R1.4Ce0.6Cu2O10-δ (R =Eu,Sm) were prepared by a solid state reaction. Samples with nominal composition were synthesized and their...

  • Phonon transport in atomic chains coupled by thermal contacts: The role of buffer layer. Xuean Zhao; Jing Li; Au Yeung, T. C.; Kam, C. H.; Qing-Hu Chen; Sun, Chang Q. // Journal of Applied Physics;May2010, Vol. 107 Issue 9, p094312-1 

    In this work, ballistic phonon transport in atomic chain nanostructures is investigated by atomic nonequilibrium Green's functions and embedded atom method. Bond length and strength modification in atomic chain (low-dimensional structure) was taken into consideration by using...

  • Growth of thick MOD-derived CeO buffer layer with less residual carbon for coated conductors. Wang, H.; Cao, L.; Wang, Y.; Jin, L.; Liu, J.; Huang, J.; Li, C.; Yu, Z.; Zhang, P. // Journal of Materials Science: Materials in Electronics;Nov2015, Vol. 26 Issue 11, p8949 

    120 nm thick CeO buffer layer with less residual carbon has been prepared on biaxially textured NiW substrate using a newly developed heat-treatment route by a metal organic deposition approach. The thickness enhancement of CeO buffer layer was achieved by multiple coatings. The residual carbon...

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