A small angle neutron scattering study of the vortex matter in La{2-x}Sr{x}CuO{4} (x=0.17)

Abstract

The magnetic phase diagram of slightly overdoped La{2-x}Sr{x}CuO{4} (x=0.17) is characterised by a field-induced hexagonal to square transition of the vortex lattice at low fields (~0.4 Tesla) [R. Gilardi et al., Phys. Rev. Lett. 88, 217003 (2002)]. Here we report on a small angle neutron scattering study of the vortex lattice at higher fields, that reveals no further change of the coordination of the square vortex lattice up to 10.5 Tesla applied perpendicular to the CuO2 planes. Moreover, it is found that the diffraction signal disappears at temperatures well below Tc, due to the melting of the vortex lattice.

arXiv comment3 pages, 2 figures. Presented at the New3SC-4 meeting, San Diego, Jan. 16-21 2003; to be published in Int. J. Mod. Phys. B

References in corpus (6)

• Field dependence of the vortex structure in d-wave and s-wave superconductors
• Direct evidence for an intrinsic square vortex lattice in the overdoped high-Tc superconductor La1.83Sr0.17CuO4+d
• Reentrant vortex lattice transformation in four-fold symmetric superconductors
• Hexagonal and Square Flux Line Lattices in CeCoIn5
• Novel vortex lattice transition in d-wave superconductors
• Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data. Application to high temperature superconductors

Cited by in corpus (3)

• Square vortex lattice at anomalously low magnetic fields in electron-doped Nd${}_{1.85}$Ce${}_{0.15}$CuO${}_4$
• Doping dependence of the vortex glass and sublimation transitions in the high-$T_c$ superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$ as determined from macroscopic measurements
• Field-induced hexagonal to square transition of the vortex lattice in overdoped La{1.8}Sr{0.2}CuO{4}