Structural, magnetic and electrical transport properties of the La0.70Sr0.30Mn0.9657Fe0.04O3+δ perovskite

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The perovskite La0.70Sr0.30Mn0.9657Fe0.04O3+δ compound has been investigated. The sample showed orthorhombic structure of Pbmn symmetry. Room temperature (RM) as well as low temperature (77 K) Mössbauer measurements indicate superparamagnetic character. Electrical investigations showed that the sample exhibits semiconductor-metal transition at 180 K. The behavior of the electrical and magnetic properties could be interpreted on the basis of the obtained hyperfine structure of the doped iron rich at 300 and at 77 K.

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