Absence of moment fragmentation in the mixed B-site pyrochlore Nd2GaSbO7

Nd-based pyrochlore oxides of the form Nd2B2O7 have garnered a significant amount of interest owing to the moment fragmentation physics observed in Nd2Zr2O7 and speculated in Nd2Hf2O7. Notably this phenomenon is not ubiquitous in this family, as it is absent in Nd2Sn2O7, which features a smaller ionic radius on the B site. Here, we explore the necessary conditions for moment fragmentation in the Nd pyrochlore family through a detailed study of …