T-P phase diagram for the new local moment 4f ferromagnet CeRu$_{2}$Ga$_{2}$B

We will report results for single crystals of a new Ce-based local moment ferromagnet, CeRu$_{2}$Ga$_{2}$B. Electrical resistivity, magnetization, and magnetic susceptibility measurements reveal ferromagnetism and hysteresis around T$_{C}$ = 16.1 K, while specific heat measurements uncover a huge anomaly at the phase transition, which results in a large discontinuity in the magnetic entropy ($\Delta $S$_{mag }$= 1.7 J/mol-K). Taken together, these data show that CeRu$_{2}$Ga$_{2}$B undergoes a first order ferromagnetic phase transition at a surprisingly high temperature. Since this type of behavior is unusual for Ce-based compounds, we additionally undertook an effort to tune the magnetic state using pressure. We will present electrical resistivity measurements under applied pressures and the resulting temperature-pressure phase diagram, with an emphasis on implications for possible nearness to a ferromagnetic quantum critical point.