Abstract

Abstract To investigate possible effects of non-trivial spin structures or spin chiral order on the Hall resistivity ρ H , transport and magnetic studies have been carried out on polycrystalline samples of SrFe 1− x Co x O 3− δ . Although neutron diffraction studies have not found the long-range ordered state of non-trivial spin structure, results of the magnetization ( M ) measurements indicate that the local structure is non-trivial. It is also found that the systems have a transition to the reentrant spin glass state. Unusual behavior of the magnetic field ( H )- and temperature ( T )-dependences of ρ H indicates the existence of effects of the non-trivial spin structure on ρ H in the reentrant spin glass systems.

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