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ChemInform Abstract: Synthesis, Structure, Electric Transport and Magnetic Properties of Sr2LaMnFeO7 and Sr2LaMn1.5Fe0.5O7.

✍ Scribed by Indu Bhushan Sharma; S. K. Magotra; D. Singh; S. Batra; K. D. S. Mudher

Publisher: John Wiley and Sons
Year: 2010
Weight: 32 KB
Volume: 30
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199949019

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✦ Synopsis

1999 dielectric properties, magnetic properties dielectric properties, magnetic properties D 9000

49 -019

Synthesis, Structure, Electric Transport and Magnetic Properties of Sr 2 LaMnFeO 7 and Sr 2 LaMn 1.5 Fe 0.5 O 7 .

-The title compounds are prepared by heating pressed pellets of stoichiometric mixtures of the corresponding oxides and SrCO 3 (5% excess) in air at 1573 K for 50 h. Both phases have a Ruddlesden-Popper structure and crystallize in the tetragonal space group I4/mmm. Magnetic measurements indicate a Mn 3+ /Mn 4+ mixed valence state. Sr 2 LaMn 1.5 Fe 0.5 O 7 shows an insulator-metal transition at low temp., a phenomenon often associated with giant magnetoresistance. -

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