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A new ternary intermetallic compound $\mathrm{Pr_2Rh_2Ga}$ was synthesized byarc-melting and was characterized by powder X-ray diffraction (PXRD),magnetization, heat capacity $\mathrm{C}_p(\textit{T})$, and electricalresistivity $\rho(T)$ measurements. PXRD patterns revealed that$\mathrm{Pr_2Rh_2Ga}$ crystallizes in the $\rm{La_2Ni_3}$-type of orthorhombicstructure with the space group $Cmca$. The temperature variation of magneticsusceptibility, $\mathrm {C}_p(\textit{T})$ and $\rho(T)$ confirmed that$\mathrm{Pr_2Rh_2Ga}$ exhibits a ferromagnetic behavior with the transitiontemperature of 18 K. The estimated Sommerfeld coefficient $\gamma$ = 640mJ/($\mathrm{Pr.mole.K^2}$) from the $\mathrm {C}_p(\textit{T})$ results in theparamagnetic region just above $T_{C}$~was large in comparison to ordinarymetals. In the paramagnetic region $\rho(T)$ data showed a metallic behaviorcharacteristic of electron - phonon scattering. The maximum negativemagneto-resistance at high field occurs in the region near the magnetic phasetransition temperature. The maximum value of magnetic entropy change ($\rm-\Delta \textit{S}_{M}$) and adiabatic temperature change ($\rm \Delta\textit{T}_{ad}$) are $\rm8.2~J/kg.K$ and $\rm3.6~K$, respectively, around thetransition temperature for the change of magnetic field 0-9 T. The calculatedrefrigerant capacity is $\rm70~J/kg$, and $\rm135~J/kg$ for a change ofmagnetic field 0-5 T and 0-9 T, respectively. Arrott plot derived fromisothermal magnetization and the universal scaling plot by normalizing $\rm-\Delta \textit{S}_{M}$ confirm that the compound undergoes a second orderferromagnetic to paramagnetic phase transition.

Structural, magnetic, thermodynamic and electrical transport properties of a new compound $\mbox{Pr}_2\mbox{Rh}_{2}\mbox{Ga}$