Complex magnetism and strong electronic correlations in Ce$_{2}$PdGe$_{3}$

We report structure/chemical results, magnetization, heat capacity, and electrical transport data for single crystals of the new tetragonal compound Ce$_{2}$PdGe$_{3}$. Single crystal X-ray diffraction shows that this material crystallizes in the space group $P$42/\textit{mmc} -- and is related to the $\alpha $-ThSi$_{2}$-type structure. Complicated magnetism, with a two-part antiferromagnetic phase transition at $T_{\mathrm{N,1}} =$ 10.7 K and $T_{\mathrm{N,2}} =$ 9.6 K and subsequent ferromagnetic ordering near $T_{\mathrm{C}} \approx $ 2.25 K is observed. The ordered ground state emerges from a lattice of Ce ions that are hybridized with the conduction electrons, as revealed by the enhanced electronic coefficient of the specific heat $\gamma \approx $ 50 mJ/mol-Ce-K$^{2}$ (extrapolated to $T =$ 0 for $T$ \textless $T_{\mathrm{C}})$. Electronic structure calculations suggest that there is significant f-electron weight in the density of states near the Fermi energy, consistent with the enhanced specific heat, and that the Fermi surface includes sheets with distinct nesting vectors. We will discuss prospects for tuning the ferromagnetism to zero temperature to produce a ferromagnetic quantum phase transition: e.g., through applied pressure and/or chemical substitution.