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Magnetic Characterization of MgB2 Bulk Superconductor for Magnetic Field Mitigation Solutions

  • Laura Gozzelino
  • Bruno Minetti
  • Roberto Gerbaldo
  • Gianluca Ghigo
  • Francesco Laviano
  • Giuseppina Lopardo
  • Carmen Plapcianu
  • Angelo Agostino
  • Stefano Cagliero
  • Marco Truccato
  • Luca Zilberti
  • Enrica Mezzetti
Original Paper

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, J c , was evaluated. The J c magnitude indicates that the material under test is a good candidate for passive magnetic shield manufacturing up to temperatures close to the transition one.

Keywords

MgB2 bulk Magnetic shielding Critical current density Scanning Hall probe technique 

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Laura Gozzelino
    • 1
  • Bruno Minetti
    • 1
  • Roberto Gerbaldo
    • 1
  • Gianluca Ghigo
    • 1
  • Francesco Laviano
    • 1
  • Giuseppina Lopardo
    • 1
  • Carmen Plapcianu
    • 2
  • Angelo Agostino
    • 3
  • Stefano Cagliero
    • 3
  • Marco Truccato
    • 4
  • Luca Zilberti
    • 5
    • 6
  • Enrica Mezzetti
    • 1
  1. 1.Department of PhysicsPolitecnico di TorinoTorinoItaly
  2. 2.National Institute of Materials PhysicsMagureleRomania
  3. 3.Department of General and Organic ChemistryUniversità di TorinoTorinoItaly
  4. 4.Department of Experimental PhysicsUniversità di TorinoTorinoItaly
  5. 5.National Institute of Metrological ResearchTorinoItaly
  6. 6.Department of Electrical EngineeringPolitecnico di TorinoTorinoItaly

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