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The effects of Ni substitution on the magnetic properties and magnetocaloric effect (MCE) of (Mn1−xNix)3Sn2 compounds (x=0–0.5) have been investigated by x-ray diffraction and magnetization measurements. It was found that Ni substitution decreases the crystal cell volume and the magnetic transition temperatures compared with pure Mn3Sn2. The MCE for all samples has been calculated from the magnetization data in terms of the isothermal magnetic entropy change ΔSM. The maximum values of ΔSMmax at the magnetic phase transition temperatures resulting from a change in magnetic field of ΔH=5 T were found to be 28.2 mJ/cm3 K for Mn3Sn2 (TC1∼257 K), increasing to 31.2 mJ/cm3 K for (Mn0.9Ni0.1)3Sn2 (TC∼167 K).

Magnetic properties and magnetocaloric effect of (Mn1-xNix)3Sn2(x=0–0.5) compounds