Unusual multiple magnetic transitions and anomalous Hall effect observed in antiferromagnetic Weyl semimetal, MnGe (Ge-rich).

We report on the magnetic and Hall effect measurements of the magnetic Weyl semimetal, MnGe (Ge-rich) single crystal. From the magnetic properties study, we identify unusual multiple magnetic transitions below the Ne'el temperature of 353 K, such as the spin-reorientation () and ferromagnetic-like transitions. Consistent with the magnetic properties, the Hall effect study shows unusual behavior around the spin-reorientation transition.