Magnetic susceptibility of the normal-superconducting transition in high-purity single-crystal alpha-uranium

Details Magnetic susceptibility of the normal-superconducting transition in high-purity single-crystal alpha-uranium Magnetic susceptibility of the normal-superconducting transition in high-purity single-crystal alpha-uranium

2002-08-26

arxiv.org/abs/cond-mat/0208501v1

Phys. Rev. B 66, 064523 (2002)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures, to appear in Phys. Rev B

Scientific paper

10.1103/PhysRevB.66.064523

We report complex ac magnetic susceptibility measurements of a superconducting transition in very high-quality single-crystal alpha-uranium using microfabricated coplanar magnetometers. We identify an onset of superconductivity at T~0.7 K 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 YBCO sample, indicates that the 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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