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We report detailed measurements of the temperature dependence of the lowercritical field Hc1 in the stripe ordered La1.6-xNd0.4SrxCuO4 (x = 0.10 and0.15) superconductors. It is found that Hc1(T) of the samples increase withdecreasing temperature and show an negative curvature below Tc. The penetrationdepth {\lambda}(T) estimated from Hc1(T) data satisfies a linear temperaturedependence behavior below Tc/2, which is consistent with that in asuperconductor with d-wave symmetry of the energy gap and the upward trend inHc1(T) may be due to the cooperation of the hole and election pockets arisingfrom the reconstruction of the Fermi surface, which contributes to illustratingthe Fermi surface reconstruction in La1.6-xNd0.4SrxCuO4.

Temperature dependence of lower critical field in stripe ordered La1.6-xNd0.4SrxCuO4 superconductors