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Gd5Si2.05-xGe1.95-xNi2x (2x ¼ 0.08, 0.1) alloys were prepared by arc melting followed by annealing at 1273 K for 96 h. Mixed monoclinic Gd5Si2Ge2-type phase, orthorhombic Gd5Si4-type phase, and a small amount of Gd5Si3-type phase were obtained in these alloys. Gd5Si2.01Ge1.91Ni0.08 alloy undergoes a second-order transition (TC) around 300 K, whereas Gd5Si2Ge1.9Ni0.1 alloy exhibits twoII	I transitions including a first-order transition (TC  ) at rv295 K and second-order transition (TC ) at rv301 K. Ni substitution can effectively reduce the thermal hysteresis and magnetic hysteresis whilemax maintaining large magnetic entropy change. The maximum magnetic entropy changes (|DSM   |) of 1	-1 Gd5Si2.05-xGe1.95-xNi2x  alloys with 2x ¼ 0.08 and 0.1 are 4.4 and 5.0 J kg-K, respectively, for 0–2 T, and are 8.0 and 9.1 J kg-1  K-1, respectively, for 0–5 T. Low hysteresis performance and relatively large magnetic entropy change make these alloys favorable for magnetic refrigeration applications

Low hysteresis and large room temperature magnetocaloric effect of Gd5Si2.05−xGe1.95−xNi2x (2x = 0.08, 0.1) alloys