Antiferromagnetic ordering in the double perovskites La2−xSrxCoRuO6

Abstract The electric transport and magnetic susceptibility of double perovskites La 2− x Sr x CoRuO 6 have been studied over a temperature range up to 800–1000 K. The crystal and magnetic structure has been determined by neutron diffraction on two samples of the series, x =0.6 and 1.4, which represent the electron- and hole-doped systems with respect to “ideal” single-valent insulator x =1. The study shows that spins in both the Co and Ru f. c. c. like sublattices exhibit a long-range ordering of the antiferromagnetic type II ( T N =60 K for x =0.6 and T N =60–80 K for x =1.4).