title: Vortex lattice studies in CeCoIn5 with H is orthogonal to c.
abstract: We present small angle neutron scattering studies of the vortex lattice (VL) in CeCoIn5 with magnetic fields applied parallel (H) to the antinodal [100] and nodal [110] directions. For H is parallel to [100], a single VL orientation is observed, while a 90° reorientation transition is found for H is parallel to [110]. For both field orientations and VL configurations we find a distorted hexagonal VL with an anisotropy, Γ=2.0±0.05. The VL form factor shows strong Pauli paramagnetic effects similar to what have previously been reported for H is parallel to [001]. At high fields, above which the upper critical field (H(c2)) becomes a first-order transition, an increased disordering of the VL is observed.
authors.affiliation: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA.
authors.forename: P
authors.initials: P
authors.lastname: Das
authors.forename: J S
authors.initials: JS
authors.lastname: White
authors.forename: A T
authors.initials: AT
authors.lastname: Holmes
authors.forename: S
authors.initials: S
authors.lastname: Gerber
authors.forename: E M
authors.initials: EM
authors.lastname: Forgan
authors.forename: A D
authors.initials: AD
authors.lastname: Bianchi
authors.forename: M
authors.initials: M
authors.lastname: Kenzelmann
authors.forename: M
authors.initials: M
authors.lastname: Zolliker
authors.forename: J L
authors.initials: JL
authors.lastname: Gavilano
authors.forename: E D
authors.initials: ED
authors.lastname: Bauer
authors.forename: J L
authors.initials: JL
authors.lastname: Sarrao
authors.forename: C
authors.initials: C
authors.lastname: Petrovic
authors.forename: M R
authors.initials: MR
authors.lastname: Eskildsen