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Title: Structural and AC loss study for pure and doped MgB{sub 2} superconductor

Superconducting polycrystalline bulk MgB{sub 2} samples doped with n-C, n-Y{sub 2}O{sub 3} and n-Ho{sub 2}O{sub 3} were prepared by powder-in-sealed (PIST) method. XRD measurement shows the influence of dopants on phase and lattice parameters of samples. The ac susceptibility measurement reveals ac loss and activation energy of the samples. Nano-C doped sample shows less ac loss in all frequency (208 Hz – 999 Hz) among the doped samples; whereas n-Ho{sub 2}O{sub 3} doped sample shows highest ac loss. The activation energy is high for rare earth (n-Y{sub 2}O{sub 3} and n-Ho{sub 2}O{sub 3}) doped samples as compare to n-C doped samples which reveals the enhancement in flux-pinning properties of these materials.
Authors:
;  [1]
  1. Functional Ceramics Lab, Department of Applied Physics, Indian School of Mines (ISM), Dhanbad – 826004 (India)
Publication Date:
OSTI Identifier:
22490586
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AC LOSSES; ACTIVATION ENERGY; COMPARATIVE EVALUATIONS; DOPED MATERIALS; HOLMIUM OXIDES; LATTICE PARAMETERS; MAGNESIUM BORIDES; MAGNETIC FLUX; POLYCRYSTALS; POWDERS; RARE EARTHS; SUPERCONDUCTORS; X-RAY DIFFRACTION; YTTRIUM OXIDES