Studies on (Sr1−Ca ) MnO3 (0.0≤x≤1.0) ceramics having negative magnetization

This paper describes the structural and magnetic properties of the (Sr _1−xCa _x) MnO ₃ (0.0≤ x ≤1.0) ceramics in bulk form synthesized by the chemical co-precipitation method. We observed that the increase in calcium concentration in strontium manganite changes the crystal symmetry from monoclinic to orthorhombic. The (Sr _1−xCa _x) MnO ₃ (0.0≤ x≤1.0) ceramic shows negative magnetization below ~42 K; above this temperature it shows paramagnetic nature and below this it shows antiferromagnetic nature. Negative magnetization in this oxide seems to result from a competition between single-ion magneto crystalline anisotropy and antisymmetric Dzyaloshinsky–Moriya interactions.