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Recently, hedgehog spin-vortex crystal magnetism has been identified experimentally in Ni-doped iron-based superconductor CaKFe₄As₄[1]. In this work, the pressure dependence of the superconducting and magnetic transition temperatures was studied on Ni-doped CaKFe₄As₄ single crystals. In-plane resistivity was measured under hydrostatic pressure up to ~5 GPa with magnetic fields parallel to tetragonal c-axis. We will present the pressure-temperature phase diagrams of CaK(Fe_1-xNi_x)₄As₄. Evolution of pressure response with composition is explored and the interaction between superconductivity and magnetic order will be discussed.
[1] Reference W.R.Meier et al. arXiv:1706.01067