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Page 4 of 7 Sun et al. Microstructures 2023;3:2023028 https://dx.doi.org/10.20517/microstructures.2023.03

Figure 1. XRD patterns of the (A) Tb Er Co (x = 0, 0.1, 0.2, 0.4, and 0.5) and (C) Tb Er Co Mn (x = 0, 0.1, 0.2, 0.4, and 0.5). The
1-x
2
x
0.1
2
x
1-x
corresponding enlarged diffraction peaks (220) are (B and D). The rhombohedral (E) and cubic (F) crystal structures of RECo 2
(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.

Figure 2. Linear thermal expansion (ΔL/L ) of (A) Tb Er Co (x = 0, 0.1, 0.2, 0.4, and 0.5) and (B) Tb Er Co Mn (x = 0, 0.1, 0.2, 0.4,
x
1-x
0.1
2
0
x
2
1-x
and 0.5).