Abstract
We have prepared a series of Fe-substituted Sr4Mn3-x Fe(x)O(10-δ) strontium manganates with x = 1, 3/2, and 2. These compounds adopt the n =3 Ruddlesden-Popper structure (I4/mmm), unlike the parent compound Sr4Mn3O10, which contains a network of face-sharing MnO6 octahedra, with the larger Fe ion preferentially occupying the Mn/Fe (1) middle layer of the corner-sharing trioctahedra slabs. We have investigated their physical properties with X-ray diffraction, X-ray absorption near edge spectroscopy, Mossbauer spectroscopy, variable temperature resistivity, and magnetic susceptibility. In addition, for the x = 2 compound we preformed room temperature neutron diffraction experiments. These compounds need to be formed at high temperatures; as a consequence they are oxygen deficient and contain some Fe3+. They are insulators and exhibit spinglass-like transitions at low temperature. (C) 2000 Academic Press.
| Original language | English |
|---|---|
| Pages (from-to) | 96-104 |
| Number of pages | 9 |
| Journal | Journal of Solid State Chemistry |
| Volume | 155 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2000 |
| Externally published | Yes |
Funding
This work was supported by the NSF-Solid State Chemistry Grant DMR 96-13106. We thank Drs. J. Richardson and C. Murphy at the IPNS-Argonne National Laboratories for their help with the neutron data, and Professor W. H. McCarroll for his critical reading of the manuscript. G. Veith thanks the Department of Education for his GAANN fellowship.