Synthesis, structure and magnetic properties of layered manganate Sr4Mn3−xCrxO10 (x=0, 0.2)

Abstract The manganates Sr 4 Mn 3− x Cr x O 10 ( x =0 and 0.2) have been synthesized by solid state reaction. Powder X-ray diffraction analysis shows orthorhombic symmetry with space group Cmca for both compounds. The magnetic susceptibility measurements show an antiferromagnetic transition at 192 and 176 K for x =0 and 0.2, respectively. The magnetic susceptibility data were estimated using a model based on spin exchange antiferromagnetic interactions in isolated (Mn 4+ ) trimer; a paramagnetic contribution due to the chromium ions was added in the case of Cr-doped materials.