Structural, electronic, magnetic, and magnetocaloric properties in intermetallic compound TbCu2Si2

•We have study electronic, magnetic, and magnetocaloric properties of the intermetallic compound TbCu2Si2.•We have used the ab-initio calculations and Monte Carlo simulation to study this system.•The intermetallic TbCu2Si2 compound exhibits a second-order antiferromagnetic-paramagnetic phase transition around TN = 8 K.•The maximum values of the magnetic entropy change (ΔSmag), and the relative cooling power (RCP) are calculated.•When increasing magnetic field the maximum of ΔSmag increase widely and TN shifts to lower temperature. The electronic, magnetic, and magnetocaloric properties of the intermetallic TbCu2Si2compound are studied. From Ab-initio calculations, we found that the magnetic moment and the exchange coupling interactions values are 5.93μBand J1 = 0.58 meV, J2 = -0.69 meV and J3 = 0.41 meV, respectively. On the other, the magnetic and magnetocaloric properties are calculated using Monte Carlo simulation based on the Ising model. The intermetallic TbCu2Si2compound exhibits a second-order antiferromagnetic-paramagnetic phase transition around TN8K, as well as a large MCE has been obtained for different external magnetic field values. Besides, the maximum values of the magnetic entropy change (ΔSmag) and the relative cooling power (RCP) are found to be 40.78 J/Kg.K, 71.58 J/kg, respectively, at h = 2 T. Additionally, by increasing the magnetic field, it is shown that the maximum of ΔSmag increase widely and TN shifts to lower temperature.