Anisotropic magnetism and Kondo-lattice behavior in the frustrated antiferromagnet Ce3MgBi5

Abstract

We report the synthesis and physical characterization of single-crystalline Ce3MgBi5, a previously unexplored member of the Ce3MPn5 family. This compound crystallizes in the hexagonal P63/mcm structure, featuring an anisotropic Ce sublattice composed of zig-zag chains along the c axis and a distorted kagome-like network in the basal plane. Magnetization measurements reveal antiferromagnetic order below TN approximately 4.2 K, accompanied by strong magnetic anisotropy and multiple field-induced metamagnetic transitions for fields applied perpendicular to [001], leading to a dome-shaped H-T phase diagram. Electrical transport exhibits characteristic signatures of a Ce-based Kondo lattice, including broad resistivity maxima and pronounced field-dependent anomalies in the magnetoresistance and Hall response that track the magnetic phase boundaries. Specific-heat measurements confirm the magnetic transition and show that the full R ln 2 entropy expected for a Ce3+ Kramers doublet is recovered by 20 K, indicating an extended temperature range of magnetic fluctuations consistent with Kondo correlations. Our results establish Ce3MgBi5 as a platform within the Ce3MPn5 family for exploring the interplay of geometric frustration, magnetic anisotropy, and Kondo-lattice physics under applied magnetic fields.

References in corpus (11)

• Nonlinear Hall Effects
• Linear magnetization dependence of the intrinsic anomalous Hall effect
• Unified explanation of the Kadowaki-Woods ratio in strongly correlated materials
• One-Dimensional Luttinger Liquids in a Two-Dimensional Moiré Lattice
• A Class of Magnetic Topological Material Candidates with Hypervalent Bi Chains
• Magnetization plateau and anisotropic magnetoresistance in the frustrated Kondo-lattice compound Ce3ScBi5
• Magnetic Toroidal Moment under Partial Magnetic Order in Hexagonal Zigzag-Chain Compound Ce${}_3$TiBi${}_5$
• Magnetic properties of the layered heavy fermion antiferromagnet CePdGa${}_6$
• Structural and magnetic properties of antiferromagnetic Ce${}_2$IrGa${}_{12}$
• Structural and Physical Properties of the Heavy Fermion Metal Ce${}_2$NiAl${}_6$Si${}_5$
• Rich unconventional Hall effects in a single quasi-kagome Kondo Weyl semimetal candidate Ce${}_3$TiSb${}_5$