fig1

Figure 1. XRD patterns of the (A) Tb_1-xEr_xCo₂ (x = 0, 0.1, 0.2, 0.4, and 0.5) and (C) Tb_1-xEr_xCo₂Mn_0.1 (x = 0, 0.1, 0.2, 0.4, and 0.5). The corresponding enlarged diffraction peaks (220) are (B and D). The rhombohedral (E) and cubic (F) crystal structures of RECo₂(RE = rare earth, the orange ball is RE, and the purple ball is Co). (G) The SEM images and EDS elemental mappings of (H) Tb, (I) Er, (J) Co, and (K) Mn of TECM, showing the uniformity of each element.