1. Magnetic Characterization of MgB2 Bulk Superconductor for Magnetic Field Mitigation Solutions
- Author
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Roberto Gerbaldo, C. Plapcianu, Stefano Cagliero, Francesco Laviano, Angelo Agostino, Luca Zilberti, Marco Truccato, Giuseppina Lopardo, Enrica Mezzetti, Laura Gozzelino, Gianluca Ghigo, and Bruno Minetti
- Subjects
magnetic shielding ,SPS ,Spark-Plasma Sintering ,MgB2 bulk ,Critical current density ,Scanning Hall probe technique ,magnetic field model ,Jc ,critical state model ,Superconductivity ,Materials science ,Field (physics) ,Condensed matter physics ,Local magnetic characterization ,MgB2 bulk samples ,Condensed Matter Physics ,Magnetic shielding ,Electronic, Optical and Magnetic Materials ,Characterization (materials science) ,Magnetic field ,Electromagnetic induction ,Paramagnetism ,Planar ,Electromagnetic shielding - Abstract
Magnetic shielding properties of MgB2 bulk samples synthesized by the SPS (Spark–Plasma–Sintering) technique were characterized in low applied magnetic fields at temperatures ranging from 20 to 37 K. The used growth technique allows one to produce this compound in different shapes and sizes required for shielding applications. In this framework, shielding magnetic-induction field profiles generated by MgB2-based shield components, shaped as planar thick disks, were measured by means of a suitable Hall probe in-plane array. The magnetic field distribution at different vertical distances above the sample was also obtained by a micrometric motion of the probe ensemble. Magnetic field profiles were then analyzed in the framework of the critical state model and the critical current density, Jc, was evaluated. The Jc magnitude indicates that the material under test is a good candidate for passive magnetic shield manufacturing up to temperatures close to the transition one.
- Published
- 2010
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