Prikhna, T. A., Eisterer, M., Rindfleisch, M., Ortino, M., Kozyrev, A. V., Shaternik, A. V., Shaternik, V. E., Tomsic, M., Moshchil, V. E., Karpets, M. V., Sverdun, V. B., Ponomaryov, S. S., Romaka, V. V., & Seidel, P. (2019). MgB₂ Wires and Bulks With High Superconducting Performance. IEEE Transactions on Applied Superconductivity, 29(5), Article 6200905. https://doi.org/10.1109/TASC.2019.2907662
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity
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Journal:
IEEE Transactions on Applied Superconductivity
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ISSN:
1051-8223
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Date (published):
26-Mar-2019
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Number of Pages:
5
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Peer reviewed:
Yes
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Keywords:
Electrical and Electronic Engineering; Condensed Matter Physics; Electronic, Optical and Magnetic Materials
en
Abstract:
The critical current density at 4.2 and 20 K up to 15 T and the temperature dependence of the irreversible field have been studied in magnesium diboride wires and bulks prepared from boron without and with carbon addition. Structural investigations using X-ray microprobe analysis have been performed. A monofilamentary wire with a round-shaped core manufactured from boron containing 2 mol.% carbon (approximate composition of its matrix MgB₁.₈₋₂.₄ O₀.₀₄₋₀.₇₁ C₀.₁₂₋₀.₁₆) demonstrated J c (20 K, 2 T) = 10⁵ A/cm² , J c (4.2 K, 15 T) = 2 × 10³ A/cm² and B irr (20 K) = 8 T, B irr (12.5 K) = 15 T. Bulk material synthesized at 2 GPa, 600 °C, 1 h from carbon doped boron demonstrated J c (10 K, 10 T) = 4 × 10³ A/cm² and J c (20 K, 6 T) = 4 × 10³ A/cm².