Abstract
High-density cylindrical MgB2 superconductors were manufactured using an ex situ powder in tube extrusion technique. The superconducting properties of the steel-sheathed MgB2 samples were examined with respect to their magnetisation responses, critical temperature and current density. The critical current density of the superconductor was determined by means of magnetisation measurements using Bean’s critical state model. J c reached a maximum of 4×105 A/cm2 at 5 K.
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The extrusion experiments and the SEM, magnetisation and ac magnetic susceptibility measurements of the extruded specimens were conducted during the cooperation of I.D. Theodorakopoulos and A. Athanasiou-Ioannou at NTUA and NCSR “Demokritos” and have been presented in the Diploma Thesis of the latter [17].
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Athanasiou-Ioannou, A., Theodorakopoulos, I.D. Improving the Characteristics of Powder-In-Tube MgB2 Superconductor Fabricated Using the Extrusion Technique. J Supercond Nov Magn 27, 1041–1047 (2014). https://doi.org/10.1007/s10948-013-2400-4
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DOI: https://doi.org/10.1007/s10948-013-2400-4