Enhancing Superconducting Properties of MgB2 by Addition of Magnetic Particles

Main results of ongoing comprehensive study of the influence of magnetic nanoparticles (MNP) on superconducting properties (transition temperature T c , critical fields and critical current density, J c , etc.) of high-quality Fe-sheathed MgB 2 wires are briefly reviewed. We prepared over 60 Fe-shea...

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Published in:Journal of superconductivity and novel magnetism 2015-02, Vol.28 (2), p.425-430
Main Authors: Novosel, N., Galić, S., Pajić, D., Zadro, K., Babić, E.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
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description Main results of ongoing comprehensive study of the influence of magnetic nanoparticles (MNP) on superconducting properties (transition temperature T c , critical fields and critical current density, J c , etc.) of high-quality Fe-sheathed MgB 2 wires are briefly reviewed. We prepared over 60 Fe-sheathed MgB 2 wires doped with 12 different types and quantities of MNPs, such as elemental magnets, magnetic borides, ferrites, and rare earth borides. Generally, doping with MNPs suppresses T c and higher MNP contents cause deterioration of superconducting properties of wires. However, light doping (≤ 2.5 wt%) with some types of MNPs (e.g., Ni) improved flux pinning and in-field J c of wires. Particularly promising seems co-doping with core-shell MNPs, where both critical fields and J c were simultaneously enhanced. Possible origins of these improvements (such as magnetic flux pinning) are briefly discussed.
doi_str_mv 10.1007/s10948-014-2807-6
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subjects Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
title Enhancing Superconducting Properties of MgB2 by Addition of Magnetic Particles
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