“…Very recently, based on some ternary Heusler alloys, Felser's research group [9][10][11][12], predicted HM ferromagnetism in several quaternary Heusler compounds such as CoFeMnZ (Z ¼Al, Si, Ga, Ge), NiFeMnGa, and NiCoMnGa. Many half-Heusler compounds without transition metals were predicted theoretically [13][14][15][16][17][18][19][20].…”