We report the experimental study on the structural and magnetic properties of a new ternary intermetallic compound $\mathrm{ Sm_2AgSi_3}$. The properties of the sample were investigated in detail by X-ray diffraction, dc-magnetization, and heat capacity measurements. The polycrystalline compound of $\mathrm{ Sm_2AgSi_3}$ crystallizes in the $\mathrm{ ThSi_2}$-type tetragonal structure (space group ${ I_{ 4_1}/amd}$). The temperature-dependent dc-magnetization and heat capacity results demonstrate that the compound undergoes ferromagnetic behaviour with a Curie temperature ($T_C$) of 14 K. The large coercive field in hysteresis loops and the thermomagnetic irreversibility in the ferromagnetic region revealed that the compound exhibits a large magnetic anisotropy. The magnitude of the applied field and the coercivity obtained from the M-H loops corroborate with the thermomagnetic irreversibility in the magnetization data. The magnetic contribution of the heat capacity reveals a broad Schottky-type anomaly above $T_C$, due to the presence of the crystal electric field effect of $\mathrm{ Sm^{ 3+}}$ in $\mathrm{ Sm_2AgSi_3}$.
Categories: cond-mat.str-el