Preparation of lamellar structured α-Fe/Fe 3 O 4 complex particle by thermal decomposition of Wüstite

Tokumitsu, Kazuto; Nasu, Takashi

doi:10.1016/s1359-6462(01)00851-x

Cited by 29 publications

(12 citation statements)

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“…5c) underline the crystallisation into magnetite and α-Fe. The formation of these two phases corresponds to the thermal decomposition [22] of the wustite phase which is metastable at low temperature. When the sample is annealed at 400°C under air atmosphere, the XRD pattern shows the oxidation of the thin film into a mixture of magnetite and hematite.…”

Section: Resultsmentioning

confidence: 99%

Elaboration and characterization of Fe1–xO thin films sputter deposited from magnetite target

et al. 2007

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Majority of the authors report elaboration of iron oxide thin films by reactive magnetron sputtering from an iron target with Ar-O 2 gas mixture. Instead of using the reactive sputtering of a metallic target we report here the preparation of Fe 1-x O thin films, directly sputtered from a magnetite target in a pure argon gas flow with a bias power applied. This oxide is generally obtained at very low partial oxygen pressure and high temperature. We showed that bias sputtering which can be controlled very easily can lead to reducing conditions during deposition of oxide thin film on simple glass substrates. The proportion of wustite was directly adjusted by modifying the power of the substrate polarization. Atomic force microscopy was used to observe these nanostructured layers. Mössbauer measurements and electrical properties versus bias polarization and annealing temperature are also reported.

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Section: Resultsmentioning

confidence: 99%

Elaboration and characterization of Fe1–xO thin films sputter deposited from magnetite target

et al. 2007

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“…154 On heating of these particles at temperatures of 250 ± 400 8C, the metastable FeO phase disproportionates to Fe 3 O 4 and Fe, while above 550 8C it is again converted into nanocrystalline FeO. 155,156 a a-FeOOH (goethite). Among the known oxide hydroxides Fe 2 O 3 .…”

Section: The Most Widely Encountered Magnetic Nanoparticlesmentioning

confidence: 99%

Magnetic nanoparticles: preparation, structure and properties

et al. 2005

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The key methods for the preparation of magnetic nano-The key methods for the preparation of magnetic nanoparticles are described systematically. The experimental data on particles are described systematically. The experimental data on their properties are analysed and generalised. The main theoret-their properties are analysed and generalised. The main theoretical views on the magnetism of nanoparticles are considered. The ical views on the magnetism of nanoparticles are considered. The bibliography includes 416 references bibliography includes 416 references. .

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“…The coercivity of the sample solidified at 10 3 and 10 −1 Pa is 0.260 kOe and 0.225 kOe, respectively. It is well‐known that α‐Fe is ferromagnetic ( T c = 1040 K) and Fe 3 O 4 is ferrimagnetic ( T c = 848 K) and its saturation magnetizations are 218 and 98 emu/g, respectively . The magnetization increases continuously with decreasing

P_{O_{2}}

due to the increase in volume fraction of Fe 3 O 4 and α‐Fe.…”

Section: Discussionmentioning

confidence: 99%

Microstructure and Magnetic Properties of Metastable RFeO₃ (R: Rare‐earth element) Formed from Undercooled Melt

Kumar

Kuribayashi

et al. 2012

J. Am. Ceram. Soc.

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Containerless levitation technique, where the undercooling can be treated as one of the major thermodynamic parameters, was used to study the influence of oxygen partial pressure (PO2) on the microstructure and physical properties of rare‐earth orthoferrites RFeO3 (where R = Rare‐earth element) in the PO2 ranges from 105 to 10−1 Pa. The microstructure of the as‐solidified samples changed into orthorhombic RFeO3 (o‐RFeO3), metastable hexagonal RFeO3 (h‐RFeO3), and Fe2+‐containing RFe2O4 and a new metastable R3Fe2O7 phases with decreasing PO2. The effect of PO2 on the magnetic properties was indicated as that the saturation magnetization gradually increased for R = La to Yb and decreased for R = Lu with decreasing PO2 due to the formation of metastable and magnetic phases such as Fe3O4 and Fe.

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Preparation of lamellar structured α-Fe/Fe 3 O 4 complex particle by thermal decomposition of Wüstite

Cited by 29 publications

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Elaboration and characterization of Fe1–xO thin films sputter deposited from magnetite target

Elaboration and characterization of Fe1–xO thin films sputter deposited from magnetite target

Magnetic nanoparticles: preparation, structure and properties

Microstructure and Magnetic Properties of Metastable RFeO₃ (R: Rare‐earth element) Formed from Undercooled Melt

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Preparation of lamellar structured α-Fe/Fe 3 O 4 complex particle by thermal decomposition of Wüstite

Cited by 29 publications

References 0 publications

Elaboration and characterization of Fe1–xO thin films sputter deposited from magnetite target

Elaboration and characterization of Fe1–xO thin films sputter deposited from magnetite target

Magnetic nanoparticles: preparation, structure and properties

Microstructure and Magnetic Properties of Metastable RFeO3 (R: Rare‐earth element) Formed from Undercooled Melt

Contact Info

Product

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Microstructure and Magnetic Properties of Metastable RFeO₃ (R: Rare‐earth element) Formed from Undercooled Melt