Abstract

We have investigated magnetic properties of the A-site ordered perovskite manganite LaBaMn2O6 by muon spin relaxation. In the ferromagnetic metal (FM) phase below TC ~ 330 K, no muon spin oscillation is observed in the time spectra, where the muon spin relaxation significantly deviates from a single exponential form. These results may suggest a large spatial distribution of spin dynamics, i.e. the inhomogeneous magnetic nature in the FM phase of LaBaMn2O6, which has been also observed in the FM phase of A-site disordered perovskite manganites. It is, therefore, suggested that there exists the spatial distribution of spin dynamics in the FM phase of the perovskite manganites irrespective of the order/disorder at the A-site of perovskite structure.

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