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Synthesis, Crystal Structure, and Magnetic Order of the Layered Iron Oxycarbonate Sr4Fe2O6CO3

โœ Scribed by K. Yamaura; Q. Huang; J.W. Lynn; R.W. Erwin; R.J. Cava

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
338 KB
Volume
152
Category
Article
ISSN
0022-4596

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โœฆ Synopsis

The iron oxycarbonate Sr 4 Fe 2 O 6 CO 3 is reported. The crystal structure and magnetic order were determined by magnetic susceptibility, powder neutron di4raction, and neutron scattering studies. The structure is tetragonal between 10 and 400 K (I4/mmm, a โ€ซุโ€ฌ 3.88907(4) A s and c โ€ซุโ€ฌ 27.9818(4) A s at 295 K), and is related to a 4 : 3 type Ruddlesden+Popper phase with CO 3 plaques in place of the middle layer of transition metal octahedra. The three-dimensional magnetic ordering transition temperature is 361 K. The magnetic order is antiferromagnetic within the FeO 2 /SrO/SrO/FeO 2 blocks and ferromagnetic between blocks.

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