Sonochemical Modification of the Superconducting Properties of MgB2

Abstract

Ultrasonic irradiation of magnesium diboride slurries in decalin produces material with significant inter-grain fusion. Sonication in the presence of Fe(CO)5 produces magnetic Fe2O3 nanoparticles embedded in the MgB2 bulk. The resulting superconductor-ferromagnet composite exhibits considerable enhancement of the magnetic hysteresis, which implies an increase of vortex pinning strength due to embedded magnetic nanoparticles.

References in corpus (12)

• Strongly linked current flow in polycrystalline forms of the new superconductor MgB2
• Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SiC doping
• Superconductivity in Dense $Mg{B}_2$ Wires
• Intralayer Carbon Substitution in the MgB2 Superconductor
• Magnetic properties of submicron Co islands and their use as artificial pinning centers
• Magnetic irreversibility and relaxation in assembly of ferromagnetic nanoparticles
• Synthesis and Stoichiometry of MgB2
• Universal transport in 2D granular superconductors
• Significant enhancement of irreversibility field in clean-limit bulk MgB2
• Effects of stoichiometry, purity, etching and distilling on resistance of MgB2 pellets and wire segments
• Improvement of critical current density in the Cu/MgB2 and Ag/MgB2 superconducting wires using the fast formation method
• Two pairing parameters in superconducting grains

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• Superconducting Nanocomposites: Enhancement of Bulk Pinning and Improvement of Intergrain Coupling
• Effect of high-intensity ultrasound on superconducting properties of polycrystalline YBCO
• High-Tc Superconductors - based Nanocomposites with Improved Intergrain Coupling and Enhanced Bulk Pinning