Magnetic field distribution and characteristic fields of the vortex lattice for a clean superconducting niobium sample in an external field applied along a three-fold axis
arXiv:1405.3087 · doi:10.1103/PhysRevB.89.184503
Abstract
The field distribution in the vortex lattice of a pure niobium single crystal with an external field applied along a three-fold axis has been investigated by the transverse-field muon-spin-rotation (TF-SR) technique over a wide range of temperatures and fields. The experimental data have been analyzed with the Delrieu's solution for the form factor supplemented by phenomenological formulas for the parameters. This has enabled us to experimentally establish the temperatures and fields for the Delrieu's, Ginzburg-Landau's, and Klein's regions of the vortex lattice. Using the numerical solution of the quasiclassical Eilenberger's equation the experimental results have been reasonably understood. They should apply to all clean BCS superconductors. The analytical Delrieu's model supplemented by phenomenological formulas for its parameters is found to be reliable for analyzing TF-SR experimental data for a substantial part of the mixed phase. The Abrikosov's limit is contained in it.
arXiv comment12 pages, 15 figures
References in corpus (14)
- Elastic theory of flux lattices in presence of weak disorder
- Muon spin rotation and relaxation in magnetic materials
- Field dependence of the vortex structure in d-wave and s-wave superconductors
- A Bragg glass phase in the vortex lattice of a type II superconductor
- Effect of the vortex core on the magnetic field in hard superconductors
- Comparison of different methods for analyzing SR line shapes in the vortex state of type-II superconductors
- Muon spin rotation studies of electronic excitations and magnetism in the vortex cores of superconductors
- Local density of states in the vortex lattice in a type II superconductor
- Morphology of the Superconducting Vortex Lattice in Ultra-Pure Niobium
- Thermodynamics and magnetic field profiles in low-kappa type-II superconductors
- Specific heat and low-lying excitations in the mixed state for a type II superconductor
- Evidence for Cooper Pair Diffraction on the Vortex Lattice of Superconducting Niobium
- Origin of spontaneous broken mirror symmetry of vortex lattices in Nb
- Magnetic form factor, field map and field distribution for a BCS type-II superconductor near its Bc2(T) phase boundary