TmGa alloy was prepared by arc melting. TmGa exhibited two successive magnetic transitions at temperatures,TAF= 11. 5K antiferromagnetic(AFMΙ) to AFMΠand TN= 15 K AFMΠto paramagnetic(PM). A field-induced metamagnetic transition AFM-FM states was observed. Although the ground state remained AFM for TmGa,the ferromagnetic(FM) state could be induced by a magnetic field at about 12 K under relatively low field change of 0. 02 T. So the transitions AFMΙ-FM,FM-AFMПand AFMП-PM were observed in a certain magnetic f...