Lower and upper critical fields in the heavy electron superconductor UPt3

B. S. Shivaram; J. J. Gannon, Jr.; David G. Hinks

doi:10.1103/PhysRevLett.63.1723

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Lower and upper critical fields in the heavy electron superconductor UPt3

B. S. Shivaram, J. J. Gannon, Jr., David G. Hinks

DOI 10.1103/PhysRevLett.63.1723 · Physical Review Letters

T1

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Abstract

We report the first comprehensive measurements of the lower critical field, &, for both orientations H∥a axis and H∥c axis, of the heavy electron superconductor UPt3. An accurate & is obtained in a LC oscillator whose resonance frequency changes on flux entry into the superconductor. The & values obtained with this technique indicate a ‘‘kink’’ for H∥a axis only. With this same technique we also measure the upper &. The results obtained are compared with & and & in anisotropic superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.55	Pressure not reported	onset