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The upper critical field Hc2 anisotropy of Ca10(PtnAs8)(Fe2-xPtxAs2)5 (n = 3,4) single crystals with long FeAs interlayer distance (d) was studied byangular dependent resistivity measurements. A scaling of the angular dependentresistivity was realized for both single crystals using the anisotropicGinzburg-Landau (AGL) approach with an appropriate anisotropy parameter{\gamma}. The AGL scaling parameter {\gamma} increases with decreasingtemperature and reaches a value of about 10 at 0.8Tc for both single crystals.These values are much larger than those of other iron-based superconductors(FeSCs). Remarkably, the values of {\gamma}2 show an almost linear increasewith the FeAs/FeSe interlayer distance d for FeSCs. Compared to cuprates, FeSCsare less anisotropic, indicating that two dimensionality of thesuperconductivity is intrinsically weak.

Anisotropy of iron-platinum-arsenide Ca10(PtnAs8)(Fe2-xPtxAs2)5 single crystals