Josephson vortex flow in Bi2Sr2CaCu2O8+y

Josephson Vortices in High Tc Superconductors

“…The boundary magnetic field B TR between triangular and rectangular lattice is defined as B TR =w 0 /2 2 s 3 (Koshelev 2002), which is also well coincided with experiments & Hirata K. 2003. On contrary, it is useful to determine the anisotropic parameter from the JV flow resistance measurement directly.…”

“…Furthermore, the triangular lattice of JV system changes to the rectangular lattice with changing the sample size smaller and increasing the magnetuc fields & Hirata K. 2003. The boundary magnetic field B TR between triangular and rectangular lattice is defined as B TR =w 0 /2 2 s 3 (Koshelev 2002), which is also well coincided with experiments & Hirata K. 2003.…”

Effect of thermal fluctuations on Josephson vortex dynamics in intrinsic Josephson junctions

“…Obviously, it is seen that γ c (h) approaches the Fraunhofer pattern above h cr . Now we focus on how the static vortex lattice structure changes in the field, because in previous studies [11][12][13] the H 0 /2 or H 0 oscillation was interpreted by the formation of a triangular or rectangular vortex lattice, respectively. Figure 2 shows the distributions of Josephson currents (solid lines) and the positions of vortex centres (circles) in the stack at γ = 0 for different h. As h increases, the Josephson vortex penetrates the middle junction of the stack at the lower critical field and then the outer junctions in the stack.…”

“…On the other hand, in recent years there has been renewal of interest in the vortex flow in a low-I B region because the vortex flow resistance induced by the motion of a Josephson vortex lattice shows H -dependent periodic oscillations [10][11][12][13]. Two different periods of oscillations of the vortex flow resistance have been observed experimentally.…”