Magnetic and superconducting anisotropy in Ni-doped RbEuFe${}_4$As${}_4$ single crystals

K. Willa, M. P. Smylie, Y. Simsek +5

We investigate the effect of Ni doping on the Fe-site in single crystals of the magnetic superconductor RbEuFe${}_4$As${}_4$ for doping concentrations of up to 4%. A clear suppression…