Enhancing Superconducting Properties of MgB2 by Addition of Magnetic Particles
- 186 Downloads
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 MgB2 wires are briefly reviewed. We prepared over 60 Fe-sheathed MgB2 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.
KeywordsMgB2 wires Magnetic nanoparticle doping Flux pinning
- 16.Snezhko, A., Prozorov, T., Prozorov, R.: Phys. Rev. B 024527, 71 (2005)Google Scholar
- 30.Mustapić, M., Pajić, D., Novosel, N., Babić, E., Zadro, K., Cindrić, M., Horvat, J., Skoko, ž., Bijelić, M., Shcherbakov, A.: Croat. Chem. Acta 83, 275–282 (2010)Google Scholar