2025/12/10 by Tomomi Furuhashi, Keisuke Hozawa, Yusuke Kozuka +3
Physics and Astronomy · Materials Science · #Rare-earth and actinide compounds #Magnetic and transport properties of perovskites and related materials #Topological Materials and Phenomena
paper · doi:10.48505/nims.5983
We have investigated the doping-induced variation of magnetic and charge transport properties of single crystalline CeCo1 −xFexGe3 with a noncentrosymmetric tetragonal BaNiSn3-type structure. The magnetization measurements revealed that, with increasing doping level x, the antiferromag- netic phase for x = 0 turns into a ferromagnetic one at x = 0.15, a cluster-glass like phase at x = 0.46, and eventually evolves into a paramagnetic phase above x = 0.67. For 0 ≤x < 0.46 wherein the electrical resistivity shows the Fermi liquid behavior, the coefficient of the T 2-term of resistivity is small for 0 ≤x ≤0.33 but increases sharply at around x ∼0.42, indicating the enhancement of density of state near the Fermi energy. Hall resistivity measurements indicate that, at 2 K in the ferromagnetic phase, the anomalous Hall conductivity remains nearly constant over the range 0.15 ≤x ≤0.42 but markedly decreases with increasing x beyond 0.42. Notably, an anomalous Hall component that is not proportional to magnetization is observed for x ≥0.42. It is anticipated that the Berry curvature in momentum space significantly changes across the tran- sition from the ferromagnetic phase to cluster-glass like phase, driven by a change in the Kondo hybridization in the present materials