Magnetocaloric effect in high Ni content Ni52Mn48−xInx alloys under low field change

► Hight Ni content Heusler alloy Ni52Mn48-xInx (x=15.5, 16.0 and 16). ► Marstensitic structural-magnetic transformation at room temperature. ► Lesser Mn at In atomic site, higher magnetization and difference between marstensite and austenite. ► Large magnetocaloric effect under low magnetic field change of 1.5 T.