title: Exploring the fragile antiferromagnetic superconducting phase in CeCoIn5.
abstract: CeCoIn5 is a heavy fermion type-II superconductor showing clear signs of Pauli-limited superconductivity. A variety of measurements give evidence for a transition at high magnetic fields inside the superconducting state, when the field is applied either parallel to or perpendicular to the c axis. When the field is perpendicular to the c axis, antiferromagnetic order develops on the high-field side of the transition. This order remains as the field is rotated out of the basal plane, but the associated moment eventually disappears above 17°, indicating that anomalies seen with the field parallel to the c axis are not related to this magnetic order. We discuss the implications of this finding.
authors.affiliation: School of Physics and Astronomy, University of Birmingham, B15 2TT, United Kingdom.
authors.forename: E
authors.initials: E
authors.lastname: Blackburn
authors.forename: P
authors.initials: P
authors.lastname: Das
authors.forename: M R
authors.initials: MR
authors.lastname: Eskildsen
authors.forename: E M
authors.initials: EM
authors.lastname: Forgan
authors.forename: M
authors.initials: M
authors.lastname: Laver
authors.forename: C
authors.initials: C
authors.lastname: Niedermayer
authors.forename: C
authors.initials: C
authors.lastname: Petrovic
authors.forename: J S
authors.initials: JS
authors.lastname: White