Abstract
The dependencies of ac susceptibility on the superimposed dc magnetic fields for the stripe-ordered La1.45Nd0.4Sr0.15CuO4 single crystal with two superconducting transitions have been studied in the 3D and 2D superconducting ranges for the fields along different orientations of the crystal. The results show that with increasing fields the interlayer Josephson coupling and the in-plane superconductivity are suppressed orderly for the fields perpendicular to CuO2 planes. The influences of the field parallel to CuO2 planes on the 3D and 2D superconductivity are much weaker than those of the field parallel to the c-axis. The irreversibility lines for the 3D and 2D superconducting states are also studied.
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