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Author Gil, D.M.; Navarro, M.C.; Lagarrigue, M.C.; Guimpel, J.; Carbonio, R.E.; Gómez, M.I.
Title (up) Crystal structure refinement, spectroscopic study and magnetic properties of yttrium hexacyanoferrate (III) Type Journal Article
Year 2011 Publication Journal of Molecular Structure Abbreviated Journal
Volume 1003 Issue 1-3 Pages 129-133
Keywords Hexacyanoferrate (III); Powder X-ray diffraction; Rietveld analysis; Infrared spectroscopy; Thermal analysis
Abstract Y[Fe(CN)6]·4H2O has been synthesized and characterized. The crystal structure was refined by Rietveld analysis using X-ray powder diffraction data. Y[Fe(CN)6]·4H2O crystallizes in the orthorhombic crystal system, space group Cmcm. Y3+ ion is eight-coordinated forming a bicapped distorted trigonal prism YN6O2. Fe3+ ion is six-coordinated in the form of an irregular octahedra FeC6 group and cyanide linkages between YN6O2 and FeC6 groups build an infinite polymeric array. The vibrational spectrum shows two bands corresponding to antisymmetric and symmetric stretching 12C14N in the CN stretching region. These bands are accompanied by four weak isotopic bands at lower frequency due to the presence of 13C and 15N in relative natural abundance. The HOH bending band split into three bands around 1600 cm−1 due to the presence of two kinds of water molecules in the structure. The thermal decomposition has been followed by thermogravimetric and differential thermal analysis, IR spectroscopy and powder XRD. The size and morphology of the complex and its thermal decomposition products were evaluated by scanning electron microscopy. The magnetic measurements confirm that Y[Fe(CN)6]·4H2O shows an antiferromagnetic order at low temperatures.
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ISSN 0022-2860 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ jguimpel @ Serial 607
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Author Gil, D.M.; Nieva, G.; Franco, D.G.; Gómez, M.I.; Carbonio, R.E.
Title (up) Lead nitroprusside: A new precursor for the synthesis of the multiferroic Pb2Fe2O5, an anion-deficient perovskite Type Journal Article
Year 2013 Publication Materials Chemistry and Physics Abbreviated Journal Mater. Chem. Phys.
Volume 141 Issue 1 Pages 355-361
Keywords Inorganic compounds; Magnetic materials; Powder diffraction; Thermogravimetric analysis (TGA); Magnetic properties
Abstract In order to investigate the formation of multiferroic oxide Pb2Fe2O5, the thermal decomposition of Pb[Fe(CN)5NO] has been studied. The complex precursor and the thermal decomposition products were characterized by IR and Raman spectroscopy, thermal analysis, powder X-ray diffraction (PXRD), scanning electron microscopy and magnetic measurements. The crystal structure of Pb[Fe(CN)5NO] was refined by Rietveld analysis. It crystallizes in the orthorhombic system, space group Pnma. The thermal decomposition in air produces highly pure Pb2Fe2O5 as final product. This oxide is an anion deficient perovskite with an incommensurate superstructure. The magnetic measurements confirm that Pb2Fe2O5 shows a weak ferromagnetic signal probably due to disorder in the perfect antiferromagnetic structure or spin canting. The estimated ordering temperature from the fit of a phenomenological model was 520 K. The SEM images reveal that the thermal decomposition of Pb[Fe(CN)5NO] produces Pb2Fe2O5 with small particle size.
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ISSN 0254-0584 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ Serial 667
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Author Gil, D.M.; Navarro, M.C.; Lagarrigue, M.C.; Guimpel, J.; Carbonio, R.E.; Gómez, M.I.
Title (up) Synthesis and structural characterization of perovskite YFeO3 by thermal decomposition of a cyano complex precursor, Y[Fe(CN)6]·4H2O} Type Journal Article
Year 2010 Publication Journal of Thermal Analysis and Calorimetry Abbreviated Journal
Volume Issue Pages 1-8
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Abstract The thermal decomposition of Y[Fe(CN)6]·4H2O has been studied in order to investigate the formation of the multi-ferroic oxide YFeO3. The starting material (Y[Fe(CN)6]·4H2O) and the decomposition products were characterized by IR spectroscopy, thermal analysis, X-ray powder diffraction (PXRD), and scanning electron microscopy. Metastable YFeO3 with hexagonal structure, space group P63/mmc, was obtained by thermal decomposition of Y[Fe(CN)6]·4H2O at 600 °C in air. Orthorhombic YFeO3 was obtained by the same method at T ≥ 800 °C in air. The crystal structure of orthorhombic YFeO3 was refined by Rietveld analysis using PXRD data. We found that it was slightly deficient in Y3+, which is in agreement with the small amount of Y2O3 found as impurity in the sample. The formula of the orthorhombic phase is Y0.986FeO3
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ISSN 13886150 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ hernan @ Serial 601
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Author Pomiro, F.; Gil, D.M.; Nassif, V.; Paesano, A.; Gómez, M.I.; Guimpel, J.; Sánchez, R.D.; Carbonio, R.E.
Title (up) Weak ferromagnetism and superparamagnetic clusters coexistence in YFe1−xCoxO_3 (0 ≤ x ≤ 1) perovskites Type Journal Article
Year 2017 Publication Materials Letters Abbreviated Journal Materials Research Bulletin
Volume 94 Issue Pages 472-482
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Notes Export Date: 14 March 2018 Approved no
Call Number BT @ jguimpel @ Serial 786
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Author Gil, D.M.; Guimpel, J.; Paesano Jr., A.; Carbonio, R.E.; Gómez, M.I.
Title (up) Y[Fe1−xCox(CN)6]·4H2O (0 ⩽ x ⩽ 1) solid solutions: Synthesis, crystal structure, thermal decomposition and spectroscopic and magnetic properties Type Journal Article
Year 2012 Publication Journal of Molecular Structure Abbreviated Journal
Volume 1015 Issue Pages 112-117
Keywords Y[Fe1−xCox(CN)6]·4H2O; Crystal structure refinement; Rietveld analysis; Infrared spectroscopy; Thermal decomposition
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-2860 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ jguimpel @ Serial 645
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