title: Evidence for a new magnetic field scale in CeCoIn5.
abstract: The Nernst coefficient of displays two distinct anomalies in magnetic field. The feature detected at Hk approximately 23 T is similar to what is observed in CeRu2Si2 at Hm = 7.8 T where a metamagnetic transition occurs. In CeCoIn5, new frequencies are observed in de Haas-van Alphen oscillations when the field exceeds 23 T where the Dingle temperature decreases by about 30%. Based on the Nernst coefficient anomalies, the magnetic phase diagram of CeCoIn5 is revised.
authors.affiliation: Grenoble High Magnetic Field Laboratory (CNRS), BP 166, 38042 Grenoble, France.
authors.forename: I
authors.initials: I
authors.lastname: Sheikin
authors.forename: H
authors.initials: H
authors.lastname: Jin
authors.forename: R
authors.initials: R
authors.lastname: Bel
authors.forename: K
authors.initials: K
authors.lastname: Behnia
authors.forename: C
authors.initials: C
authors.lastname: Proust
authors.forename: J
authors.initials: J
authors.lastname: Flouquet
authors.forename: Y
authors.initials: Y
authors.lastname: Matsuda
authors.forename: D
authors.initials: D
authors.lastname: Aoki
authors.forename: Y
authors.initials: Y
authors.lastname: Onuki