High magnetic ordering temperature in the perovskites Sr{sub 4-x}La{sub x}Fe{sub 3}ReO{sub 12} (x=0.0, 1.0, 2.0)

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2012.06.031· OSTI ID:22149827

Retuerto, M.; Li, M. -R.; Go, Y. B. ^[1]; Ignatov, A.; Croft, M. ^[2]; Ramanujachary, K. V. ^[3]; Herber, R. H.; Nowik, I. ^[4]; Hodges, J. P. ^[5]; Dachraoui, W.; Hadermann, J. ^[6]

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1. Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854 (United States)
2. Department of Physics and Astronomy, Rutgers, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States)
3. Department of Chemistry and Physics, Rowan University, 210 Mullica Hill Road, Glassboro, NJ 08028 (United States)
4. Racah Institute of Physics, Hebrew University, Jerusalem, 91904 Israel (Israel)
5. Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)
6. EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp (Belgium)

A series of perovskites Sr{sub 4-x}La{sub x}Fe{sub 3}ReO{sub 12} (x=0.0, 1.0, 2.0) has been prepared by wet chemistry methods. The structure analyses by powder X-ray and neutron diffraction and electron microscopy show that these compounds adopt simple perovskite structures without cation ordering over the B sites: tetragonal (I4/mcm) for x=0.0 and 1.0 and orthorhombic (Pbmn) for x=2.0. The oxidation states of the cations in the compound with x=0.0 appear to be Fe{sup 3+/4+} and Re{sup 7+} and decrease for both with La substitution as evidenced by X-ray absorption spectroscopy. All the compounds are antiferromagnetically ordered above room temperature, as demonstrated by Moessbauer spectroscopy and the magnetic structures, which were determined by powder neutron diffraction. The substitution of Sr by La strongly affects the magnetic properties with an increase of T{sub N} up to {approx}750 K. - Graphical abstract: High resolution transmission electron microscopy image of Sr{sub 4-x}La{sub x}Fe{sub 3}ReO{sub 12} (x=2.0), showing twin domains. Fourier transforms are given of the areas indicated by the circles. Highlights: Black-Right-Pointing-Pointer Sr{sub 4-x}La{sub x}Fe{sub 3}ReO{sub 12} (x=0.0, 1.0, 2.0) perovskites prepared by wet chemistry. Black-Right-Pointing-Pointer PXD, PND, ED, indicate no cation ordering, I4/mcm) for x=0.0, 1.0, Pbmn for x=2. Black-Right-Pointing-Pointer XAS show oxidation states Fe{sup 3+/4+} and Re{sup 7+}; both decrease with increasing x. Black-Right-Pointing-Pointer All order antiferromagnetically above RT, with highest T{sub N} {approx}750 K.

• OSTI ID: 22149827
• Journal Information: Journal of Solid State Chemistry, Vol. 194; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
CATIONS
FOURIER TRANSFORMATION
IRON IONS
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
NEUTRON DIFFRACTION
ORTHORHOMBIC LATTICES
PEROVSKITE
POWDERS
RHENIUM IONS
TRANSMISSION ELECTRON MICROSCOPY
VALENCE
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY