beta-Mn alloys were studied by Mn-55 NQR and NMR. The temperature (T)
dependence of the nuclear spin-lattice relaxation rate (1/T-1) of Mn-5
5 at site II is sensitive to the doping of non-transition metal elemen
ts. 1/T-1 varies in proportion to root T in beta-Mn, however, 1/T-1 in
creases rapidly and becomes nearly T-independent with the doping of no
n-transition metal impurities (In, Sn and Sb). This result represents
that the electronic state of Mn atoms changes from itinerant state in
pure beta-Mn to more localized state in beta-Mn-(In, Sn and Sb).