Magnetic susceptibility of the normal-superconducting transition in high-purity single-crystal (formula presented) -uranium
- O’Brien, J. L.
- Hamilton, A. R.
- Clark, R. G.
- Mielke, C. H.
- Smith, J. L.
- Cooley, J. C.
- Rickel, D. G.
- Starrett, R. P.
- Reilly, D. J.
- Lumpkin, N. E.
- Hanrahan, R. J.
- Hults, W. L.
DOIAbstract
We report complex ac magnetic susceptibility measurements of a superconducting transition in very high-quality single-crystal (formula presented) -uranium using microfabricated coplanar magnetometers. We identify an onset of superconductivity at (formula presented) in both the real and imaginary components of the susceptibility which is confirmed by resistivity data. A superconducting volume fraction argument, based on a comparison with a calibration (formula presented) sample, indicates that superconductivity in these samples may be filamentary. Our data also demonstrate the sensitivity of the coplanar micro-magnetometers, which are ideally suited to measurements in pulsed magnetic fields exceeding 100 T
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