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arXiv · 1201.1880

Vortex lattice studies in CeCoIn5 with H perpendicular to c

P. Das·J. S. White·A. T. Holmes·S. Gerber·E. M. Forgan·A. D. Bianchi·M. Kenzelmann·M. Zolliker·J. L. Gavilano·E. D. Bauer·J. L. Sarrao·C. Petrovic·M. R. Eskildsen
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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 || [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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P. Das, J. S. White, A. T. Holmes, S. Gerber, E. M. Forgan, A. D. Bianchi, M. Kenzelmann, M. Zolliker, J. L. Gavilano, E. D. Bauer, J. L. Sarrao, C. Petrovic, M. R. Eskildsen. 2012-01-09. Vortex lattice studies in CeCoIn5 with H perpendicular to c. https://doi.org/10.1103/physrevlett.108.087002

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