Itinerant ferromagnetism to insulating antiferromagnetism:: A magnetic and transport study of single crystal SrRu1-xMnxO3 (0≤x<0.60) -: art. no. 035104

We report results of a magnetic and transport study of SrRu1-xMnxO3 (0less than or equal tox<0.60), i.e., Mn doped SrRuO3. The Mn doping drives the system from the itinerant ferromagnetic state (T-C=165 K for x=0) through a quantum critical point at x(c)=0.39 to an insulating antiferromagnetic state. The onset of antiferromagnetism is abrupt with a Neel temperature increasing from 205 K for x=0.44 to 250 K for x=0.59. Accompanying this quantum phase transition is a drastic change in resistivity by as much as eight orders of magnitude as a function of x at low temperatures. The critical composition x(c)=0.39 sharply separates the two distinct ground states, namely the ferromagnetic metal from the antiferromagnetic insulator.