MAGNETIC-ANOMALIES IN SMMN2GE2

The results of electrical resistance (rho), magnetoresistance (Delta r ho/rho) and magnetization (M) measurements are reported for polycrysta lline SmMn2Ge2. Sharp variations in rho at 108 and 142 K attributable to well-known magnetic transitions from Mn sublattice are noted. Sign of the rho across these transitions exhibits anomalies. Delta rho/rho data indicate the existence of a hitherto unrecognized magnetic anomal y near 30 K, presumably of ferrimagnetic type as revealed by isotherma l M data at low temperatures.