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We study the general problem of a manifold of interacting elastic lines whosespatial correlations are strongly affected by the competition between randomand ordered pinning. This is done through magneto-transport experiments withYBa2Cu3O7-d thin films that contain a periodic vortex pinning array created viamasked ion irradiation, in addition to the native random pinning. The strongfield-matching effects we observe suggest the prevalence of periodic pinning,and indicate that at the matching field each vortex line is bound to anartificial pinning site. However, the vortex-glass transition dimensionality,quasi-2D instead of the usual 3D, evidences reduced vortex-glass correlationsalong the vortex line. This is also supported by an unusual angular dependenceof the magneto-resistance, which greatly differs from that of Bose-glasssystems. A quantitative analysis of the angular magnetoresistance allows us tolink this behaviour to the enhancement of the system anisotropy, a collateraleffect of the ion irradiation.

Unusual magneto-transport of YBa2Cu3O7-d films due to the interplay of anisotropy, random disorder and nanoscale periodic pinning