MN-55 NQR STUDY IN BETA-MN ALLOYS

The electronic state of Mn al site II in beta Mn alloys was studied by Mn-55 NQR. The nuclear spin-lattice relaxation rate, 1/T-1, of beta M n varies proportional to root T, where T is temperature, indicating be ta Mn to be an itinerant-type near antiferromagnet. With doping of In and Sn, 1/T-1 becomes T-independent in the paramagnetic state, indicat ing Mn moments to be localized. On the contrary, such a marked change in T-dependence of 1/T-1 was not observed in samples with doping of Fe , Cr, Si, Al and Ge.