Magnetic and transport properties in the proposed Weyl semimetal CeGaGe

There is considerable interest in materials that host topologically protected electronic states for next-generation technologies, with compounds that also exhibit magnetic order providing an opportunity to study the interplay between topological electrons and localized magnetic moments. One such proposed material is CeGaGe, which crystallizes in the noncentrosymmetric I4₁md structure, analogous to related compounds known to host topological states [1–4]. We report magnetization and transport measurements on single crystals of CeGaGe, which order ferromagnetically below T_C = 6.5 K. Magnetoresistance and Hall effect measurements reveal complex, anisotropic, and sample-dependent behavior that mirrors the sample dependence of the magnetic order observed by neutron diffraction.

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[3] H. Hodovanets et al, Phys. Rev. B 98, 245132 (2018).

[4]. D. Ram et al, Phys. Rev. B 108, 024428 (2023).