Magnetic levitation and lateral forces in MgB2 bulk superconductors fabricated by co-sintering process, in-situ and ex-situ
Abstract
The objective of this work is to enhance the magnetic levitation effect of bulk MgB2 by exploring the potential of different in-situ and ex-situ mixtures. This could help to elucidate the role of these mixtures on the magnetic levitation force and the lateral force. We explored the potential of 0, 5, 10, 20, 30, and 40 wt % ex-situ MgB₂ powder concentrations by mixing them with 1.5 g of in-situ powder through a solid-state reaction method. An analysis of the vertical levitation force (Fz) and lateral guidance force (Fx) was conducted at 20 K and 25 K under field-cooled (FC) and zero-field-cooled (ZFC) conditions. It can be observed that the sample with the 20 wt% ex-situ addition amount achieved the largest vertical levitation force, reaching 17.03 N. Similarly, the sample with the 10 wt% ex-situ addition amount demonstrated the largest lateral force, reaching 6.31 N. These findings suggest that incorporating some ex-situ MgB2 powder into the mixture of 2B and Mg during synthesis may enhance the magnetic vertical levitation force and lateral force.
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URN: https://sloi.org/urn:sl:tjoee93330
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