Abstract
Electrical resistance R and specific heat C were measured to study the physical properties of the novel compound Nd5CuSn3 which crystallizes in the hexagonal Hf5CuSn3-type structure. Nd ions occupy two non-equivalent sites. The values of R and C showed distinct anomalies at the magnetic transition temperature TM of 56.3 K. The increments of TM in the magnetic fields are consistent with the material being in a ferro- or ferri-magnetic state at temperatures below TM.
Highlights
Rare-earth-based intermetallic compounds exhibit various magnetic and electrical properties that arise from 4f electrons, such as magnetic ordering, higher-rank multipole ordering, and unconventional superconductivity.[1,2,3] Ternary intermetallic compounds R5TX3 (R=Ce, Yb, T=Cu, Ag, X=Sn, Pb) have been observed to crystallize in the hexagonal Hf5CuSn3-type structure.[4]
The results show that the compound underwent a phase transition at 56.3 K and suggest that this transition is of ferromagnetic or ferrimagnetic ordering
The diffraction peaks indicate that the hexagonal Hf5CuSn3-type structure is the primary phase
Summary
Rare-earth-based intermetallic compounds exhibit various magnetic and electrical properties that arise from 4f electrons, such as magnetic ordering, higher-rank multipole ordering, and unconventional superconductivity.[1,2,3] Ternary intermetallic compounds R5TX3 (R=Ce, Yb, T=Cu, Ag, X=Sn, Pb) have been observed to crystallize in the hexagonal Hf5CuSn3-type structure.[4]. With the exception of Ce-based compounds, magnetic properties of Dy5CuPb3, Gd5NiPb3, and Nd5NiPb3 have been studied.[9,10,11] Dy5CuPb3 undergoes the two successive transitions: ferrimagnetic order at 45 K and antiferromagnetic order at 6.5 K. Nd5NiPb3 shows antiferromagnetic order at 42 K and undergoes a weak-ferromagnetic spin canting transition at 8 K. These complex magnetic phase transitions are related to the two non-equivalent rare-earth ion sites in the crystal structure of each compound. The results show that the compound underwent a phase transition at 56.3 K and suggest that this transition is of ferromagnetic or ferrimagnetic ordering
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