NMR study of the novel superconducting state in CeCoIn5

A Fulde-Ferrell-Larkin-Ovchinnkov (FFLO) state is investigated in the quasi-2D heavy fermion CeCoIn5 by a In-115 NMR study in both perpendicular and parallel field to the ab-plane. Although the topology of the phase transition lines in the H-T phase diagram of the FFLO state is identical for both configurations, there are several remarkable differences between them. (c) 2006 Elsevier B. V. All rights reserved.