  The magnetic properties and magnetocaloric effect of an intermetallic
compound $\mathrm{Er_2Rh_3Si}$ was investigated by performing temperature
dependence of dc- and ac-magnetic susceptibility and isothermal magnetizations.
Polycrystalline $\mathrm{Er_2Rh_3Si}$ compound with $\mathrm{Mg_2Ni_3Si}$-type
of rhombohedral Laves phases (space group $R\overline{3}m$, hR18) structure was
synthesized by arc-melting method. The ac- and dc-magnetic susceptibility
results revealed that the compound exhibited ferromagnetic order with $T_C$
$\approx$ 18 K. The obtained isothermal magnetic entropy changes ($\Delta
S_m$), and relative power cooling for a change of magnetic field 0-9 T are
10.1~$\mathrm{J.~kg^{-1}.~K^{-1}}$, and 255 J. kg$^{-1}$ respectively. Arrott
plots and also the universal scaling plot by rescaled temperature axis and
normalized $\Delta S_m$ collapse onto a one curve for independent of magnetic
fields, confirming a second-order ferromagnetic to paramagnetic phase
transition in $\mathrm{Er_2Rh_3Si}$.
