Site preference of Fe in nanoparticles of ZnFe2O4

Li, F.S; Wang, L; Wang, J.B; Q, Zhou; Zhou, Xuezhi; Kunkel, H. P.; Williams, Gwyn

doi:10.1016/s0304-8853(03)00544-4

Cited by 155 publications

(72 citation statements)

References 12 publications

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“…In bulk form, zinc ferrite has a normal spinel structure in which all Zn 2+ ions are in A sites and Fe 3+ ions are distributed in B sites and it is antiferromagnetic below 10 K and paramagnetic above this temperature [34]. However, in bulk, zinc ferrite only occurs in intra-sub-lattice (B-B) exchange interactions, and it does not have intra-sub-lattice (A-A) exchange interactions or inter-sub-lattice (A-B) super-exchange interactions [35]. Inter-sub-lattice (A-B) super-exchange interactions of the cations are much stronger than the (A-A) and (B-B) interactions [7].…”

Section: Effect Of Concentration Of Pvp On Phase Composition Morpholmentioning

confidence: 99%

A Novel Research on Behavior of Zinc Ferrite Nanoparticles in Different Concentration of Poly(vinyl pyrrolidone) (PVP)

Kamari

Naseri

Saion

2014

Metals

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Zinc ferrite nanocrystals were prepared from an aqueous solution containing metal nitrates and various of concentrations of poly(vinyl pyrrolidone) (PVP), i.e., 0, 15, 40, and 55 g/L, as a capping agent. To stabilize the particles, they were thermally treated at 873 K, as an optimum calcination temperature. The behaviors of the polymeric precursor were analyzed by use of simultaneous thermo-gravimetry (TG) and derivative thermo-gravimetry analyses (DTG). The presence of the crystalline phase in each sample was confirmed by X-ray diffraction (XRD) analysis. The average particle size and the morphology of the nanoparticles were determined by transmission electron microscopy (TEM), and these parameters were found to differ at various concentrations of PVP. Fourier transform infrared spectroscopy (FT-IR) confirmed the presence of metal oxide bands for all the PVP concentrations and confirmed the absence of organic bands for PVP concentrations less than 55 g/L. Measurements of the magnetization value of the zinc ferrite nanoparticles were obtained at room temperature by using a vibrating sample magnetometer (VSM), which showed that, in the absence of PVP, the sample exhibited a paramagnetic behavior while, in the presence of PVP, samples have a super-paramagnetic behavior.

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Section: Effect Of Concentration Of Pvp On Phase Composition Morpholmentioning

confidence: 99%

A Novel Research on Behavior of Zinc Ferrite Nanoparticles in Different Concentration of Poly(vinyl pyrrolidone) (PVP)

Kamari

Naseri

Saion

2014

Metals

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show abstract

“…In bulk form, zinc ferrite has a normal spinel structure in which all Zn 2+ ions are in A sites and Fe 3+ ions are distributed in B sites [29]. However, in bulk, zinc ferrite only occurs in intra-sub-lattice (B-B) exchange interactions, and it does not have intrasublattice (A-A) exchange interactions or intersublattice (A-B) superexchange interactions [30]. Intersublattice (A-B) superexchange interactions of the cations are much stronger than the (A-A) and (B-B) interactions [4].…”

Section: Phase Composition and Morphology Of Precursors Andmentioning

confidence: 99%

“…Intersublattice (A-B) superexchange interactions of the cations are much stronger than the (A-A) and (B-B) interactions [4]. Due to the cation inversion, which originates from thermal and mechanical treatment [21], the structure of ZnFe 2 O 4 transfers from a normal spinel structure to a mixed spinel structure [30]. This cation inversion causes the zinc ferrite nanoparticles to experience intersublattice (A-B) superexchange interactions and intrasublattice (A-A) exchange interactions in addition to intrasublattice (B-B) exchange interactions.…”

Section: Phase Composition and Morphology Of Precursors Andmentioning

confidence: 99%

An Overview on Nanocrystalline ZnFe₂O₄, MnFe₂O₄, and CoFe₂O₄ Synthesized by a Thermal Treatment Method

Naseri

Saion

Kamali

2012

ISRN Nanotechnology

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This study reports the simple synthesis of MFe 2 O 4 (where M = Zn, Mn, and Co) nanoparticles by a thermal treatment method, followed by calcination at various temperatures from 723 to 873 K. Poly(vinyl pyrrolidone) (PVP) was used as a capping agent to stabilize the particles and prevent them from agglomeration. The characterization studies were conducted by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The average particle sizes were obtained by TEM images, which were in good agreement with the XRD results. Fourier transform infrared spectroscopy (FT-IR) confirmed the presence of metal oxide bands for all the calcined samples. Magnetic properties were demonstrated by a vibrating sample magnetometer (VSM), which displayed that the calcined samples exhibited superparamagnetic and ferromagnetic behaviors.

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“…In bulk form, zinc ferrite has an normal spinel structure in which all Zn 2+ ions are in A sites and Fe 3+ ions are distributed in B sites [47]. However, in bulk, zinc ferrite only occurs in intra-sub-lattice (B-B) exchange interactions, and it does not have intra-sub-lattice (A-A) exchange interactions or inter-sublattice (A-B) super-exchange interactions [48]. Inter-sub-lattice (A-B) super-exchange interactions of the cations are much stronger than the (A-A) and (B-B) interactions [18].Due to the cation inversion, which originates from thermal and mechanical treatment [40], the structure of ZnFe 2 O 4 transfers from a normal spinel structure to a mixed spinel structure [48].…”

Section: Magnetic Properties Of Mfe 2 O 4 Nanocrystal Obtained Vsmmentioning

confidence: 99%

“…However, in bulk, zinc ferrite only occurs in intra-sub-lattice (B-B) exchange interactions, and it does not have intra-sub-lattice (A-A) exchange interactions or inter-sublattice (A-B) super-exchange interactions [48]. Inter-sub-lattice (A-B) super-exchange interactions of the cations are much stronger than the (A-A) and (B-B) interactions [18].Due to the cation inversion, which originates from thermal and mechanical treatment [40], the structure of ZnFe 2 O 4 transfers from a normal spinel structure to a mixed spinel structure [48]. This cation inversion causes the zinc ferrite nanoparticles to experience inter-sub-lattice (A-B) super-exchange interactions and intra-sub-lattice (A-A) exchange interactions in addition to intra-sub-lattice (B-B) exchange interactions.…”

Section: Magnetic Properties Of Mfe 2 O 4 Nanocrystal Obtained Vsmmentioning

confidence: 99%

Crystalization in Spinel Ferrite Nanoparticles

Naseri¹,

Saion²

2012

Advances in Crystallization Processes

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Site preference of Fe in nanoparticles of ZnFe2O4

Cited by 155 publications

References 12 publications

A Novel Research on Behavior of Zinc Ferrite Nanoparticles in Different Concentration of Poly(vinyl pyrrolidone) (PVP)

A Novel Research on Behavior of Zinc Ferrite Nanoparticles in Different Concentration of Poly(vinyl pyrrolidone) (PVP)

An Overview on Nanocrystalline ZnFe₂O₄, MnFe₂O₄, and CoFe₂O₄ Synthesized by a Thermal Treatment Method

Crystalization in Spinel Ferrite Nanoparticles

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Site preference of Fe in nanoparticles of ZnFe2O4

Cited by 155 publications

References 12 publications

A Novel Research on Behavior of Zinc Ferrite Nanoparticles in Different Concentration of Poly(vinyl pyrrolidone) (PVP)

A Novel Research on Behavior of Zinc Ferrite Nanoparticles in Different Concentration of Poly(vinyl pyrrolidone) (PVP)

An Overview on Nanocrystalline ZnFe2O4, MnFe2O4, and CoFe2O4 Synthesized by a Thermal Treatment Method

Crystalization in Spinel Ferrite Nanoparticles

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Product

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About

An Overview on Nanocrystalline ZnFe₂O₄, MnFe₂O₄, and CoFe₂O₄ Synthesized by a Thermal Treatment Method