Issue 10, 2004
From the journal:

Journal of Materials Chemistry

Synthesis and characterization of the new Ln2FeMoO7 (Ln = Y, Dy, Ho) compounds

Gabriel M. Veith,a   Maxim V. Lobanov,a   Thomas J. Emge,a   Martha Greenblatt,*a   Mark Croft,b   Frank Stowasser,c   Joke Hadermannd  and  Gustaaf Van Tendelood  

* Corresponding authors

a Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ, USA
E-mail: martha@rutchem.rutgers.edu

b Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA

c Bruker AXS GmbH, Östliche Rheinbrückenstr. 49, Karlsruhe, Germany

d EMAT, University of Antwerp, Groenenborgerlaan 171, Antwerp, Belgium

Abstract

The new compounds Ln2FeMoO7 (Ln = Y, Dy, Ho) have been synthesized by solid-state reaction in evacuated silica tubes. The crystal structure of Dy2FeMoO7 and Ho2FeMoO7 was determined ab initio by simulated annealing in the R[3 with combining macron] space group. Transmission electron microscopy study of Y2FeMoO7 revealed an unusual lamellar microstructure, composed of blocks with the structure of different zirconolite polymorphs. The dominant form corresponds to the zirconolite-2M type structure (space group C2/c) with a partially ordered array of Fe and Mo ions. X-Ray near edge spectroscopy data are consistent with formally Fe3+ and Mo5+ oxidation states for all compounds. Magnetic and transport measurements are reported.

Graphical abstract: Synthesis and characterization of the new Ln2FeMoO7 (Ln = Y, Dy, Ho) compounds

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Article information

DOI
https://doi.org/10.1039/B315028C
Article type
Paper
Submitted
21 Nov 2003
Accepted
11 Mar 2004
First published
15 Apr 2004

J. Mater. Chem., 2004,14, 1623-1630

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Synthesis and characterization of the new Ln2FeMoO7 (Ln = Y, Dy, Ho) compounds

G. M. Veith, M. V. Lobanov, T. J. Emge, M. Greenblatt, M. Croft, F. Stowasser, J. Hadermann and G. V. Tendeloo, J. Mater. Chem., 2004, 14, 1623 DOI: 10.1039/B315028C

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