Temperature dependent lattice distortion in aerogel-produced Fe–Mo oxides

Hamdeh, Hussein H.; Al-Ghanem, H.; Folkerts, T.J.; Eltabey, M. M.; Ho, J. C.; Willey, Ronald J.

doi:10.1063/1.2948970

Cited by 2 publications

(2 citation statements)

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“…It is specific for iron and the results (i.e., the various Mössbauer parameters) are extremely sensitive to the electronic, magnetic and structural features of the involved Fe-bearing phases, thus generally allowing phase identification and quantitative phase analysis of mixtures of iron oxides that are difficult to distinguish from each other in the respective XRD patterns. Mössbauer studies have been made to evaluate the temperature dependence of lattice distortion in two aerogel-synthesized iron−molybdenum oxides having different atomic ratios Fe:Mo = 1:1 and 2:3, but both with a β-FeMoO 4 structure by Hamdeh et al Planckaert et al presented a critical comparison between conventional Mössbauer spectroscopy and energy and time-resolved nuclear resonant scattering. The three Mössbauer techniques are evaluated by the characterization of the complex magnetic structure of Fe 3 Al alloy.…”

Section: Introductionmentioning

confidence: 99%

Mössbauer, Raman, and Magnetoresistance Study of Aluminum-Based Iron Oxide Thin Films

Shinde

Meena²,

Yusuf³

et al. 2011

J. Phys. Chem. C

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Thin films of Al-based hematite iron oxide were synthesized by spray pyrolysis in aqueous medium onto the glass microslides. The compact and homogeneous distribution of grains (spindle-shaped hematite nanostructures) with varying sizes has been observed in surface morphological studies. The room temperature Mössbauer study has been carried out to monitor the local environment around Fe cations and valence state of Fe ions. Mössbauer and micro-Raman (low temperature) results suggest that oxygen vacancies cause cation redistribution between the interstitial sites resulting in magnetic ordering. The variation of magnetoresistance in low magnetic field (<3 kOe) is also reported.

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Section: Introductionmentioning

confidence: 99%

Mössbauer, Raman, and Magnetoresistance Study of Aluminum-Based Iron Oxide Thin Films

Shinde

Meena²,

Yusuf³

et al. 2011

J. Phys. Chem. C

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“…As the temperature increases, the magnetization of nanocomposite spheres initially increases to reach a peak at 40 K, beyond which it decreases a paramagnetic-type behavior. This reflects the superparamagnetic characteristics of the nanoparticles, while 40 K is generally referred to as the blocking temperature [24][25][26]. Additionally, it is obvious that the merger of the zero field cooled (ZFC) and field cooled (FC) curves starts at about 125 K, and there is a plateau region in ZFC curve.…”

Section: Resultsmentioning

confidence: 99%

Drug-Carrying Magnetic Nanocomposite Particles for Potential Drug Delivery Systems

Asmatulu

Fakhari

Wamocha

et al. 2009

Journal of Nanotechnology

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Recommended by Sakhrat KhizroevDrug-carrying magnetic nanocomposite spheres were synthesized using magnetite nanoparticles and poly (D,L-lactide-coglycolide) (PLGA) for the purpose of magnetic targeted drug delivery. Magnetic nanoparticles (∼13 nm on average) of magnetite were prepared by a chemical coprecipitation of ferric and ferrous chloride salts in the presence of a strong basic solution (ammonium hydroxide). An oil-in-oil emulsion/solvent evaporation technique was conducted at 7000 rpm and 1.5-2 hours agitation for the synthesis of nanocomposite spheres. Specifically, PLGA and drug were first dissolved in acetonitrile (oily phase I) and combined with magnetic nanoparticles, then added dropwise into viscous paraffin oil combined with Span 80 (oily phase II). With different contents (0%, 10%, 20%, and 25%) of magnetite, the nanocomposite spheres were evaluated in terms of particle size, morphology, and magnetic properties by using dynamic laser light scattering (DLLS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and a superconducting quantum interference device (SQUID). The results indicate that nanocomposite spheres (200 nm to 1.1 μm in diameter) are superparamagnetic above the blocking temperature near 40 K and their magnetization saturates above 5 000 Oe at room temperature.

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Temperature dependent lattice distortion in aerogel-produced Fe–Mo oxides

Cited by 2 publications

References 10 publications

Mössbauer, Raman, and Magnetoresistance Study of Aluminum-Based Iron Oxide Thin Films

Mössbauer, Raman, and Magnetoresistance Study of Aluminum-Based Iron Oxide Thin Films

Drug-Carrying Magnetic Nanocomposite Particles for Potential Drug Delivery Systems

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