First-Order Transition between Weak and Strong Pinning in Clean Superconductors with Enhanced Spin Susceptibility

R. Modler; P. Gegenwart; M. Lang; M. Deppe; M. Weiden; T. Lühmann; C. Geibel; F. Steglich; C. Paulsen; J. L. Tholence; N. Sato; T. Komatsubara; Y. Ōnuki; M. Tachiki; S. Takahashi

doi:10.1103/PhysRevLett.76.1292

First-Order Transition between Weak and Strong Pinning in Clean Superconductors with Enhanced Spin Susceptibility

R. Modler, P. Gegenwart, M. Lang, M. Deppe, M. Weiden, T. Lühmann, C. Geibel, F. Steglich, C. Paulsen, J. L. Tholence, N. Sato, T. Komatsubara, Y. Ōnuki, M. Tachiki, S. Takahashi

DOI 10.1103/PhysRevLett.76.1292 · Physical Review Letters

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Abstract

Dilatometric and magnetic experiments on high-quality single crystals of the superconducting compounds UPd2Al3 and CeRu2, which have enhanced spin susceptibilities, demonstrate a first-order transition between weak and strong pinning at T<0.9Tc ( H>10 kOe). This is compatible with a staggered order parameter due to the formation of a “Fulde-Ferrell-Larkin-Ovchinnikov” state.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UPd2Al3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.85	Pressure not reported	midpoint
CeRu2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6.1	Pressure not reported	unknown
UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.94	Pressure not reported	unknown