Microwave properties of superconducting MgB2

Date
2001-06-25
Authors
Hakim, N.
Parimi, P.
Canfield, Paul
Kusko, C.
Sridhar, S.
Canfield, Paul
Bud'ko, Sergey
Finnemore, Douglas
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Ames Laboratory
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Abstract

Measurements of 10 GHz microwavesurface resistance, Rs, of dense MgB2wire and pellet are reported. Significant improvements are observed in the wire with reduction of porosity. The data lie substantially above the theoretical estimates for a pure Bardeen–Cooper–Schrieffer s-wave superconductor. However, the Rs (20 K) of the wire is an order of magnitude lower than that of polycrystalYBa2Cu3O6.95 and matches with single-crystal YBa2Cu3O6.95. The results show promise for the use of MgB2 in microwave applications.

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<p>The following article appeared in <em>Applied Physics Letters</em> 78 (2001): 4160 and may be found at <a href="http://dx.doi.org/10.1063/1.1379366" target="_blank">http://dx.doi.org/10.1063/1.1379366</a>.</p>
Keywords
Physics and Astronomy, Microwaves, Copper, Microwave spectroscopy, Polycrystals, Superconducting wires
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