Fig. 1: Crystal structure, phase diagram, and magnetic properties.

a Schematic structure of the bond-disordered breathing pyrochlore LiGa0.2In0.8Cr4O8. b T-x phase diagram of LiGa1−xInxCr4O8. The inverse red triangle marks the investigated x = 0.8. c Temperature dependence of the static magnetic susceptibility χdc(T) and its decomposition into the intrinsic χintr(T) and the orphan spin contribution χorp(T). d High-field magnetization at selected temperatures. The black dash-dotted and green dashed lines indicate the orphan spin magnetization Morp(T) and the bulk magnetization Mintr(T), respectively. A linear extrapolation gives the spin pseudogap of ΔM/kB ~ 20 K.