Field-induced hexagonal to square transition of the vortex lattice in overdoped La{1.8}Sr{0.2}CuO{4}
arXiv:cond-mat/0308533 · doi:10.1016/j.physc.2004.03.187
Abstract
We report on a small angle neutron scattering study of the vortex lattice in overdoped La{2-x}Sr{x}CuO{4} (x=0.2) up to high magnetic fields (9.5 Tesla) applied perpendicular to the CuO2 planes. At low magnetic fields we observe a crossover from hexagonal to square coordination of the vortex lattice. This field-induced transition confirms the results obtained in slightly overdoped La{2-x}Sr{x}CuO{4} (x=0.17).
3 pages, 2 figures. to appear in Physica C (proceedings for the M2S-HTSC-VII Conference, May 25-30, Rio de Janeiro)