Magnetic relaxation behavior in Tb-doped perovskite manganite

Abstract Tb-doped LaMnO 3 perovskite manganite has been synthesized by a conventional solid-state reaction method. The XRD patterns of the sample revealed that it has a single perovskite-type phase with orthorhombic symmetry at room temperature. The magnetic properties of the sample were investigated. The results of the static and dynamic magnetization measurements show that there is the magnetic relaxation behavior of the cluster (spin) glass in the Tb-doped LaMnO 3 sample. The outcomes of the ac nonlinear magnetization indicate that the magnetic relaxation behavior of the cluster (spin) glass was attributed to the coexistence and competition of a ferromagnetic double exchange between Mn 3+ and Mn 4+ and an antiferromagnetic superexchange coupling among Tb 3+ and Tb 3+ as well as Mn 3+ and Mn 3+ .