Microscopic Charge Separation in Tb1-xCaxMnO3 (x ∼1)

Microscopic magnetic structures of Tb 1- x Ca x MnO 3 ( x ∼1) have been investigated by means of small-angle neutron scattering (SANS) and Lorentz micrograph experiments. We have found that ferromagnetic microclusters of the order of ∼10 nm are invaded in the antiferromagnetic matrix with the G-type spin structure. We have interpreted the coexistence of the magnetic clusters in terms of intrinsic change separation.