Magnetic dilution of the iron sublattice in CoFe{sub 2-x}Sc{sub x}O{sub 4} (0{<=}x{<=}1)

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.09.004· OSTI ID:21494116

Lefevre, C ^[1]; Roulland, F; Viart, N ^[1]; Greneche, J M ^[2]; Pourroy, G ^[1]

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1. Institut de Physique et Chimie des Materiaux de Strasbourg, UMR 7504 (CNRS-Universite de Strasbourg), 23 rue du Loess, BP 43, 67034 Strasbourg (France)
2. Laboratoire de Physique de l'Etat Condense, UMR 6087 (CNRS-Universite du Maine), Avenue Olivier Messiaen, 72085 Le Mans (France)

Substitution of Fe for Sc in CoFe{sub 2}O{sub 4} spinel structure is presented. All CoFe{sub 2-x}Sc{sub x}O{sub 4} compounds crystallize in the spinel type structure (space group Fd3-bar m). By using X-ray diffraction studies, magnetic measurements and in-field {sup 57}Fe Moessbauer spectrometry, the limit of substitution has been determined to be equal to x=0.56. An increase in the cell parameter and the strains and a decrease in the apparent crystallites size are observed. For x>0.3, a partial oxidation of cobalt is evidenced and Co{sup 3+} is stabilized in the structure. A ferromagnetic behavior has been observed for all investigated compounds. As x increases, the Curie temperature and the hyperfine fields decrease. Following the Stephenson model, the diminution of T{sub C} is ascribed to a decrease of the main J{sub AB} interaction. -- Graphical abstract: Evolution of the cell parameters, the magnetic properties and the Moessbauer spectra in CoFe{sub 2-r}Sc{sub r}O{sub 4} (0{<=}r{<=}1). Display Omitted

• OSTI ID: 21494116
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 11; Other Information: DOI: 10.1016/j.jssc.2010.09.004; PII: S0022-4596(10)00387-7; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT IONS
COBALT OXIDES
CUBIC LATTICES
CURIE POINT
DILUTION
INTERACTIONS
IRON 57
IRON OXIDES
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
OXIDATION
SCANDIUM OXIDES
SPACE GROUPS
SPINELS
STRAINS
X-RAY DIFFRACTION
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
COBALT COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
IONS
IRON COMPOUNDS
IRON ISOTOPES
ISOTOPES
MINERALS
NUCLEI
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCANDIUM COMPOUNDS
SCATTERING
STABLE ISOTOPES
SYMMETRY GROUPS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE