Antiferromagnetism and field-induced transitions in single crystals of the Remeika phase compound Nd₃Rh₄Ge₁₃

Remeika phases with the chemical formula R₃T₄M₁₃ (R = rare earth, T = transition metal, M = group 14 metals) make up a vast family of intermetallic compounds. This caged structure of the Remeika phase results in a wide range of physical properties, including superconductivity, quantum criticality, and structural distortions, making their characteristics strikingly different for each material. In this talk, we report the first-ever single crystal growth and characterization of Nd₃Rh₄Ge₁₃ utilizing susceptibility, heat capacity, and electrical transport measurements. Nd₃Rh₄Ge₁₃ crystallizes in the Yb₃Rh₄Sn₁₃ cubic structure type and orders antiferromagnetically below T_N = 1.6K. In addition, we see evidence of meta-magnetic transitions emerging from the ordered state. We also explore the possibility of iso-valent substitution of rhodium, thereby tuning the spin-orbit coupling (SOC) strength and exchange interactions. These systems allow us to study how the SOC influences the magnetic structures and properties of the rare-earth-based Remeika phases.