ELECTRICAL-RESISTIVITY STUDIES ON ANTIFERROMAGNETIC CU3PT-MN SPIN-GLASS

Results of electrical resistivity rho(T) measurements on (Cu3Pt)100-xM nx alloys with 0.5, 1, 1.85, and 3 at. % Mn in the temperature range o f 1.8-300 K are presented. For 0.5 and 1.0 at. % Mn alloys, rho(T) sho ws a maximum at low temperature followed by a minimum at a higher temp erature. For 1.85 and 3 at. % Mn alloys, both the minimum and maximum in resistivity are washed out. The observed behavior seems to result f rom the weak indirect Ruderman-Kittel-Kasuva-Yosida interaction respon sible for spin glass behavior in these alloys.