Abstract
The magnetic behavior of Sn-substituted Sr2IrO4 has been examined through magnetization measurements and single-crystal neutron diffraction on Sr2Ir1−xSnxO4 for 0.05≲x≲0.35. For all x examined, the magnetic ground state is similar to that induced in Sr2IrO4 by application of a magnetic field. This magnetic state is characterized by a small net moment due to the alignment of canted moments within an otherwise antiferromagnetic structure. The weak ferromagnetic behavior is observed in the magnetization data for both unique crystallographic orientations. Diffraction data reveal an anisotropic response in the lattice parameters, with an overall lattice expansion, as well as a small reduction in the rotation of the IrO6 octahedra. The magnetic ordering temperature is continually suppressed with increasing x, and long-range magnetic order persists to the highest Sn concentrations synthesized.
