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