Low Temperature Fabrication of MgB2

Details Low Temperature Fabrication of MgB2 Low Temperature Fabrication of MgB2

2001-07-25

arxiv.org/abs/cond-mat/0107534v1

Physics

Condensed Matter

Superconductivity

3 pages, 5 figures (submitted to Journal of Applied Physics)

Scientific paper

10.1063/1.1420771

We report the fabrication of MgB2 with bulk superconducting properties by conventional solid state methods at temperatures as low as 550 C. Mg deficiencies of the type Mg1-xB2 were tested. Tc was found to decrease by about 1K at large x, though the amount of non-stoichiometry, if any, is likely to be very small. For specific processing conditions, indications of the 25-30 K transition often seen in thin films were seen in the bulk materials. The lower temperature transition may be associated with the grain boundaries. These results indicate that it should be possible to fabricate MgB2 with bulk properties in in-situ thin films at temperatures of 600 C or less.

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