Ordered, disordered and coexistent stable vortex lattices in NbSe_2 single crystals

Details Ordered, disordered and coexistent stable vortex lattices in NbSe_2 single crystals Ordered, disordered and coexistent stable vortex lattices in NbSe_2 single crystals

2008-03-03

arxiv.org/abs/0803.0307v1

Physics

Condensed Matter

Superconductivity

9 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.100.247003

It is commonly accepted that the peak effect (PE) in the critical current density of type II superconductors is a consequence of an order-disorder transition in the vortex lattice (VL). Examination of vortex lattice configurations (VLCs) in its vicinity requires the use of experimental techniques that exclude current induced VL reorganization. By means of linear ac susceptibility experiments in the Campbell regime, where vortices are forced to oscillate (harmonically) around their effective pinning potentials, we explore quasi-static stable and metastable VLCs in NbSe_{2} single crystals near the PE. We identify three different regions: for TT_{2}(H) configurations are fully disordered and no metastability is observed. In the T_{1}

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