Vortex States in Intrinsic Josephson Junctions of B$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta }$ in High Parallel Magnetic Fields

The $I_{c}$-axis resistivity measurements were performed in the vicinity of the \textit{ab}-plane in order to investigate the interaction between Josephson vortices (JVs) and pancake vortices (PVs) in B$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta }$ mesoscopic single crystals. It was found that the vortex lock-in transition becomes considerably broad in high magnetic fields, while the angular dependence of resistance exhibits the sharp lock-in features in low magnetic field region. The magnetic field dependence of the resistance exhibits the non-monotonic behavior probing the different vortex phases in tilted magnetic fields. Sharp dips and steps in the $c$-axis resistance were observed accompanied by penetration of quantized pancake vortices by tilting external fields from the \textit{ab}-plane.