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Journal Article

Anomalous peak effect in heavy-fermion, intermediate-valence and A15 superconductors: Evidence for a Fulde-Ferrell-Larkin-Ovchinnikov state?

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Citation

Gegenwart, P., Deppe, M., Köppen, M., Kromer, F., Lang, M., Modler, R., et al. (1996). Anomalous peak effect in heavy-fermion, intermediate-valence and A15 superconductors: Evidence for a Fulde-Ferrell-Larkin-Ovchinnikov state? Annalen der Physik, 508(4), 307-319. doi:10.1002/andp.2065080402.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-E611-1
Abstract
An experimental study based upon magnetic and dilatometric measurements is presented for the clean high-κ superconductors UPd2Al3, CeRu2 and V3Si. All three compounds show an enhanced spin susceptibility. Their superconducting state is strongly Pauli limited, and an anomalous peak effect is observed at T<(0.8-0.9)Tc, slightly below Hc2(T). This phenomenon appears to be qualitatively consistent with a first-order transition between weak and collective pinning, caused by the formation of a staggered order parameter in a generalized Fulde-Ferrell-Larkin-Ovchinnikov phase (M. Tachiki et al., Z. Phys. B, in press).