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Preparation and characterization of superconducting MgB 2 rods
Author(s) -
Orlińska N.,
Zaleski A.,
Paszula J. M.,
Wokulski Z.
Publication year - 2007
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200711016
Subject(s) - rod , superconductivity , materials science , impurity , scanning electron microscope , magnetization , transmission electron microscopy , analytical chemistry (journal) , phase (matter) , crystallography , condensed matter physics , chemistry , nanotechnology , composite material , magnetic field , medicine , physics , alternative medicine , organic chemistry , pathology , quantum mechanics , chromatography
Superconducting Cu/Fe/MgB 2 and Steel/Cu/MgB 2 rods were prepared through the ex‐situ modified PIT technique with explosive consolidation method. The phase composition, microstructural features were investigated by X‐ray diffraction and scanning electron microscope. The AC susceptibility for a core samples was measured by the AC susceptometry. Measurements of the magnetization hysteresis loops were also carried out. It is found that no impurity phase was formed in MgB 2 rods. In addition, it was found that grains in both Cu/Fe/MgB 2 and Steel/Cu/MgB 2 rods are densely packed. The magnetic measurements show that the critical temperature of Cu/Fe/MgB 2 and Steel/Cu/MgB 2 rods is 37.7 K and 37.6 K, respectively. The high critical current density of 9.22 × 10 5 A/cm 2 (4.1 K, 0.2 T) was obtained for Steel/Cu/MgB 2 rod. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)