Scaling of the angular dependence of the critical current density in high-Tcsuperconductors

We report a general scaling behavior of the dependence of the critical current density ${\mathit{j}}_{\mathit{c}}$(B,T,Θ) on the direction of the magnetic field at low temperatures in c-axis-oriented high-${\mathit{T}}_{\mathit{c}}$ superconductor thin films with different strengths of interlayer coupling. Measurements of ${\mathit{j}}_{\mathit{c}}$(B,T,Θ) for pure ${\mathrm{YBa}}_2$ ${\mathrm{Cu}}_3$ ${\mathrm{O}}_7$, doped ${\mathrm{YBa}}_2$(${\mathrm{Cu}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{Zn}}_{\mathit{x}}$ ${)}_3$ ${\mathrm{O}}_7$, ${\mathrm{Bi}}_2$ ${\mathrm{Sr}}_2$ ${\mathrm{CaCu}}_2$ ${\mathrm{O}}_8$, and ${\mathrm{YBa}}_2$ ${\mathrm{Cu}}_3$ ${\mathrm{O}}_7$/${\mathrm{PrBa}}_2$ ${\mathrm{Cu}}_3$ ${\mathrm{O}}_7$ superlattice films with different relative orientations of the current j, magnetic field B, and crystallographic direction c allow the identification of the dissipation caused by flux parallel to the superconducting layers moving in the c direction.