Doping-induced variation of anomalous Hall effect in the magnetic Weyl-Kondo metal candidate
                    <math>
                      <mrow>
                        <msub>
                          <mi>CeCo</mi>
                          <mrow>
                            <mn>1</mn>
                            <mo>−</mo>
                            <mi>x</mi>
                          </mrow>
                        </msub>
                        <msub>
                          <mi>Fe</mi>
                          <mi>x</mi>
                        </msub>
                        <msub>
                          <mi>Ge</mi>
                          <mn>3</mn>
                        </msub>
                      </mrow>
                    </math>

Tomomi Furuhashi; Keisuke Hozawa; Yusuke Kozuka; Yoshihiro Tsujimoto; Kazunari Yamaura; Jun Fujioka

doi:10.1103/l7gy-27nl

Article Doping-induced variation of anomalous Hall effect in the magnetic Weyl-Kondo metal candidate

{CeCo}_{1 - x} {Fe}_{x} {Ge}_{3}

Tomomi Furuhashi ; Keisuke Hozawa ; Yusuke Kozuka ; Yoshihiro Tsujimoto ; Kazunari Yamaura ; Jun Fujioka

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Tomomi Furuhashi, Keisuke Hozawa, Yusuke Kozuka, Yoshihiro Tsujimoto, Kazunari Yamaura, Jun Fujioka. Doping-induced variation of anomalous Hall effect in the magnetic Weyl-Kondo metal candidate

{CeCo}_{1 - x} {Fe}_{x} {Ge}_{3}

. Physical Review B. 2025, 112 (24), 245116. https://doi.org/10.1103/l7gy-27nl

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(abstract)

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

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In Copyright
©2025 American Physical Society

Keyword: CeCo1−xFexGe3, Weyl-Kondo metal, anomalous Hall eﬀect

Date published: 2025-12-05

Publisher: American Physical Society (APS)

Journal:

Physical Review B (ISSN: 24699950) vol. 112 issue. 24 245116

Funding:

University of Tsukuba
Ministry of Education, Culture, Sports, Science and Technology 18H01171
Ministry of Education, Culture, Sports, Science and Technology 21K18813
Ministry of Education, Culture, Sports, Science and Technology 22H01177
Ministry of Education, Culture, Sports, Science and Technology 25K01657
Fusion Oriented REsearch for disruptive Science and Technology JPMJFR203D
Support for Pioneering Research Initiated by the Next Generation JPMJSP2124

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5983

First published URL: https://doi.org/10.1103/l7gy-27nl

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Updated at: 2025-12-10 12:30:12 +0900

Published on MDR: 2025-12-10 12:23:54 +0900

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