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RESEARCH PRODUCT
Evidence for the verwey transition in highly nonstoichiometric nanometric fe-based ferrites
N. Guigue-millotNiels KellerPascal Perriatsubject
Materials scienceCondensed matter physicsDegree (graph theory)Order (ring theory)02 engineering and technology[SPI.MAT] Engineering Sciences [physics]/Materials010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesSoft chemistry0104 chemical sciences[SPI.MAT]Engineering Sciences [physics]/MaterialsCondensed Matter::Materials Sciencechemistry.chemical_compoundCharge orderingAmplitudeOctahedronchemistryNanometre0210 nano-technologyComputingMilieux_MISCELLANEOUSMagnetitedescription
The nanometric scale allows an investigation of the Verwey transition: the impact of varying degree of oxidation of Fe cations on this transition was studied by means of zero-field-cooled superconducting quantum interference device measurements in nanometric highly nonstoichiometric particles of pure and Ti-substituted magnetite synthesized using soft chemistry route. It is clearly shown that (i) there is a shift of the transition towards higher temperatures for nanometer scaled compounds and (ii) the amplitude, the temperature, and the order of the transition are only depending on the number of ${\mathrm{Fe}}^{2+}{/\mathrm{F}\mathrm{e}}^{3+}$ pairs in octahedral coordination.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-06-01 |