Abstract
The Josephson effect between a single-crystal UPt3 and a conventional superconductor Al has been investigated under pressure for the junction on the UPt3 surface perpendicular to the hexagonal c[0001] axis. Simultaneously measured magnetization has revealed that the Meissner fraction approaches a minimum value of ∼1% at the critical pressure of Pc∼0.4GPa. The critical temperature Tc and the temperature TJ where a measurable Josephson critical current Ic first appears decrease with increasing pressure; the decreasing rate of |dTc/dP| is almost constant, whereas |dTJ/dP| shows an abrupt increase above Pc, indicating that the Josephson effect is suppressed above Pc. These results, together with the decrease in penetration depth λ derived from the magnetic-field dependence of Ic, suggest that the superconducting phase is modified above Pc by the disappearance of the symmetry-breaking antiferromagnetic order.
Original language | English |
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Article number | 174514 |
Journal | Physical Review B |
Volume | 93 |
Issue number | 17 |
DOIs | |
Publication status | Published - 2016 May 23 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics