Fig. 1: Crystal structure and experimental data collected from CaCo₃Ti₄O₁₂.

a Quadruple perovskite crystal structure. b Zero-field (ZFC) and field cooled (FC) magnetization data collected as a function of temperature from CaCo₃Ti₄O₁₂ under an applied field of 1 T. c Magnetization data collected as a function of field from CaCo₃Ti₄O₁₂. Observed (black), calculated (red), and difference (green) plots from the refinement of CaCo₃Ti₄O₁₂ against neutron powder diffraction data collected at d 300 K, e 1.6 K under 0 T, and f 1.6 K under 8 T. In d the upper set of tick marks corresponds to contributions from CaCo₃Ti₄O₁₂ and the lower set to contributions from the CoTiO₃ secondary phase. In e and f from top to bottom the tick marks correspond to: CaCo₃Ti₄O₁₂ nuclear and magnetic reflections and CoTiO₃ nuclear and magnetic reflections. The shaded regions correspond to contributions from the cryomagnet which were excluded from the refinement.