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Doping of MgB 2 Using Molecular Magnets as Precursors

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Abstract

We present the effect of single molecular magnet ([Fe(bpca) 2Dy(NO 3)4] ⋅H 2 O⋅4.5 CH 3 NO 2 and [Mn 2(naften) 2(CH 3COO)(CH 3OH)] ⋅BPh 4) thermolysis on the superconducting properties of polycrystalline MgB 2 samples when inserted and sintered by spark plasma sintering technique. As a result of pyrolysis, Fe- and Dy-magnetic compounds grow within the MgB 2 matrix and give a paramagnetic behavior in normal state, whereas the Mn-based compounds display negligible magnetic properties. We find that the magnetic critical current density of the as-obtained superconducting composites, as well as the pinning mechanism, is dependent on the magnetic background, with a noticeable advantage for the sample with magnetic compounds.

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Acknowledgments

The work was supported by the Romanian NASR, Partnerships Program, in the framework of the Project BENZISUPRA.

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Authors and Affiliations

  1. National Institute of Materials Physics, 105 bis Atomistilor Str., 077125, Magurele, Romania

    Viorel Sandu, Petre Badica & Gheorghe Aldica

  2. Inorganic Chemistry Department, University of Bucharest, 23 Dumbrava Rosie Str., 020462, Bucharest, Romania

    Marilena Ferbinteanu

  3. High Voltage Electron Microscopy Laboratory, Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba, Sendai, 980-8577, Japan

    Yuichiro Hayasaka

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  1. Viorel Sandu
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  2. Petre Badica
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  3. Gheorghe Aldica
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  5. Yuichiro Hayasaka
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Correspondence to Viorel Sandu.

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Sandu, V., Badica, P., Aldica, G. et al. Doping of MgB 2 Using Molecular Magnets as Precursors. J Supercond Nov Magn 27, 1837–1843 (2014). https://doi.org/10.1007/s10948-014-2538-8

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  • DOI: https://doi.org/10.1007/s10948-014-2538-8

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