Structural characterization of the perovskite series Sr1−xLaxTi0.5Mn0.5O3

The perovskite-type compounds Sr1−xLaxTi0.5Mn0.5O3, x =0, 0.1, 0.2, 0.3, 0.4 and 0.5 have been synthesized by solid-state methods, and their room temperature structures determined using X-ray synchrotron powder diffraction. The x= 0.0 end member, SrMn0.5Ti0.5O3 is cubic in space group View the MathML sourcePm3¯m; there being no evidence for ordering of the Ti4+ and Mn4+ cations. We find that x =0.5 compound is rhombohedral in View the MathML sourceR3¯c rather than orthorhombic as reported previously. Magnetic measurements suggest that both SrMn0.5Ti0.5O3 and Sr0.5La0.5Mn0.5Ti0.5O3 are spin-glasses.