Tuning magnetism in FeAs-based materials via a tetrahedral structure
Tuning magnetism in FeAs-based materials via a tetrahedral structure
Resistivity, magnetic susceptibility, neutron scattering, and x-ray crystallography measurements were used to study the evolution of magnetic order and crystallographic structure in single-crystal samples of the Ba${}_{1\ensuremath{-}x}$Sr${}_{x}$Fe${}_{2}$As${}_{2}$ and Sr${}_{1\ensuremath{-}y}$Ca${}_{y}$Fe${}_{2}$As${}_{2}$ series. A nonmonotonic dependence of the magnetic ordering temperature ${T}_{0}$ on chemical pressure is compared to the progression of the antiferromagnetic …