First-Order Transition between Weak and Strong Pinning in Clean Superconductors with Enhanced Spin Susceptibility
- Modler, R.
- Gegenwart, P.
- Lang, M.
- Deppe, M.
- Weiden, M.
- Lühmann, T.
- Geibel, C.
- Steglich, F.
- Paulsen, C.
- Tholence, J.
- Sato, N.
- Komatsubara, T.
- Ōnuki, Y.
- Tachiki, M.
- Takahashi, S.
DOIAbstract
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 < 0.9T(c) (H > 10 kOe). This is compatible with a staggered order parameter due to the formation of a ''Fulde-Ferrell-Larkin-Ovchinnikov'' state
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