2006/08/31 by X. Gratens, Gratens, X., L. Mendonca Ferreira +17
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0608722
4 pages, 4 figures
arxiv created 2006/08/31 · openalex publication_date 2006/08/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Magnetization measurements were performed on CeCoIn5 at temperature down to 30 mK with the magnetic field applied in three different orientations: parallel, near parallel (∼ 100 rotated) and perpendicular to the ab-plane. For these three orientations we have observed crossover features in the torque/magnetization traces at fields just below Hc2, giving further evidence for the formation of a high field Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) superconducting state in CeCoIn5 for H ∥ ab-plane and newly indicates that the FFLO state persists for out-of-plane field orientations. Furthermore, for the (near) parallel to ab-plane field configurations and T≤ 50 mK, we have found an anomalous peak effect(APE) just below the crossover field when the magnetic field is sweeping down from normal to superconducting state. The dynamics of this peak suggests the existence of a metastable phase occurring in the vicinity of the FFLO phase and raises questions about the order (first or second) of the transition from FFLO to the superconducting state. None of the above features were found in a Ce0.98Gd0.02CoIn5 crystal.