High-field magnetization and magnetic phase diagrams in Nd2RhIn8 and Tb2RhIn8

We present magnetic phase diagrams of Nd2RhIn8 and Tb2RhIn8 determined by magnetization and magnetoresistivity measurements on single crystals, including high-field magnetization up to 60 T. Both compounds order antiferromagnetically with the c-axis as the easy magnetization axis. Their magnetic phase diagrams are qualitatively rather similar. At low temperatures up to 1/2TN, when applying the field along the tetragonal c-axis, we observe first-order transition to another magnetic phase prior to transition to the ferromagnetic order. The magnetic phase diagrams resemble those of other R2RhIn8 or RRhIn5 compounds.