Vortex lattice studies in CeCoIn5 with H perpendicular to c

Details Vortex lattice studies in CeCoIn5 with H perpendicular to c Vortex lattice studies in CeCoIn5 with H perpendicular to c

2012-01-09

arxiv.org/abs/1201.1880v1

Phys. Rev. Lett. 108, 087002 (2012)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.108.087002

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 || [100], a single VL orientation is observed, while a 90 degree reorientation transition is found for H || [110]. For both field orientations and VL configurations we find a distorted hexagonal VL with an anisotropy, Gamma = 2.0 +/- 0.05. The VL form factor shows strong Pauli paramagnetic effects similar to what have previously been reported for H || [001]. At high fields, above which the upper critical field (Hc2) becomes a first-order transition, an increased disordering of the VL is observed.

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