Related to defining Current density

[Aarthi Tamil maran]

Hi, as I discussed, the current density direction is defined in the SOT implementation https://groups.google.com/g/mumax2/c/Pw0Xv3z27AA/m/fo2BOEvxCQAJ. But the value we are giving in J = vector (0, 0, ?) along the z-direction will be taken directly as spin current density or charge current density? 

Kindly clarify whether J along the x-direction is considered charge current density and J along the z-direction is considered spin current density only.