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Second magnetization peak (SMP) in hole-doped cuprates and iron pnictidesuperconductors has been widely explored. However, similar feature in thefamily of electron-doped cuprates is not common. Here, we report the vortexdynamics study in the single crystal of an electron-doped cupratePr$_{0.87}$LaCe$_{0.13}$CuO$_4$ superconductor using dc magnetizationmeasurements. A SMP feature in the isothermal $M(H)$ was observed for$H$$\parallel$$ab$-planes. On the other hand, no such feature was observed for$H$$\parallel$$c$-axis in the crystal. Using magnetic relaxation data, adetailed analysis of activation pinning energy via collective creep theorysuggests an elastic to plastic creep crossover across the SMP. Moreover, for$H$$\parallel$$ab$, a peak in the temperature dependence of critical currentdensity is also observed near 7 K, which is likely be related to a dimensionalcrossover (3D-2D) associated to the emergence of Josephson vortices at lowtemperatures. The anisotropy parameter obtained $\gamma$ $\approx$ 8-11indicates the 3D nature of vortex lattice mainly for $H$$\parallel$$c$-axis.The $H$-$T$ phase diagrams for $H$$\parallel$$c$ and $H$$\parallel$$ab$ arepresented.

Vortex Dynamics and Phase Diagram in the Electron Doped Cuprate Superconductor Pr$_{0.87}$LaCe$_{0.13}$CuO$_4$