Magnetic ground states of CaRu(1-x)Mn(x)O(3)(0.2 ≤ x ≤ 0.9): a magnetic Compton scattering study.

The magnetism of CaRu1-xMnxO3( 0.2 <= x <= 0.9) was studied by the magnetic Compton scattering experiment. The result of the spin-polarized electron momentum density distributions (magnetic Compton profiles) and the absolute value of spin moment indicate that Mn doping introduces magnetic moments on Ru ions, and the Ru and Mn spin moments were antiferromagnetically coupled. Moreover the spin moment of Ru ions increased proportionally in the x range. These results were explained by a mixed valence model and inhomogeneous magnetic structure, where the inhomogeneous magnetic ground state in CaRu1-xMnxO3 would be formed by a ferrimagnetic network from the Mn3.5+ and Ru4.5+ clusters in the paramagnetic matrix CaRuO3 for x < 0.5 and in the antiferromagnetic matrix CaMnO3 for x > 0.5.