Structure, Nonstoichiometry and Magnetic Properties of the Perovskites Sr_1‐xCa_xMnO_3‐δ.

Abstract

Magnetic properties Magnetic properties D 9000Structure, Nonstoichiometry and Magnetic Properties of the Perovskites Sr1-xCaxMnO3-δ. -The structural, thermal, and magnetic properties of the series of title compounds (0 ≤ x ≤ 1) are characterized as a function of nonstoichiometry δ by XRD, thermal analysis, and magnetic measurements. A cubic to hexagonal phase transformation of the Sr-rich samples is accompanied by a large expansion of the lattice that is reduced by Ca substitution. The Ca/Sr-manganites are antiferromagnets with TN = 170 K for x = 0.5 and δ = 0.02, and TN = 120 K for x = 1 and δ = 0.05. -(TOEPFER*, J.; PIPPARDT, U.; VOIGT, I.; KIEGEL, R.; Solid State Sci. 6 (2004) 7, 647-654; FB Werkstofftech.,

Oxygen deficient perovskites: effect of structure on electrical conductivity, magnetism and electrocatalytic activity.

“…192 The structural transformation upon Ba-doping is followed by the change in electrical properties. 192 It is also possible to replace Sr 2+ by a smaller cation, namely Ca 2+ , to obtain CaSrMn2O6, which has a perovskite-type structure 193 unlike the parent Sr2 compound. To our knowledge, the effect of doping a smaller A-site cation, i.e., Ca 2+ , on charge transport properties of Sr2Mn2O6…”