Mössbauer study of nanocrystalline Ni–Zn ferrite

Wang, L.; Li, F.S.

doi:10.1016/s0304-8853(00)01331-7

Cited by 69 publications

(16 citation statements)

References 12 publications

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“…The lower value of saturation magnetization with respect to bulk material may be due to their large surface-to-volume ratio, which enhances the spin-canting phenomenon [14]. Both of these parameters become constant after 700 in conformity with the literature [9]. The doublet for the sample reveals the collapse of magnetic ordering due to superparamagnetic relaxation.…”

Section: Resultssupporting

confidence: 75%

“…Wang and Li [9] prepared Nil-xZnxFe204 (0.0 ~ x ~ 1) by the polyvinyl alcohol sol gel method and reported that the Mossbauer spectra of samples exhibit superparamagnetic relaxation at room temperature and an ordered magnetic structure at 77 K. Recently Sileo et al [10] prepared Ni-Zn ferrites by citrate precursor method and investigated the insertion of small amount of rare earth cations into a nickel zinc ferrites.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Nanocrystalline Ni0.5Zn0.5Fe2O4 by Aerosol Route and Its Characterization

Singhal¹,

Garg²,

Chandra³

2004

Icame 2003

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Abstract. Nano-size particles of Nio.sZno.sFe204 ferrite were prepared through aerosol route. The solutions of iron, nickel and zinc nitrates were mixed in stoichiometric proportion, passed through a pneumatic nebulizer, to get very fine mist (aerosols), and a furnace at ~600oe in air atmosphere. Through various events in succession, metal atoms form ferrite in air. The average particle size was found to be 16±6 nm which increased to 80±8 nm after annealing at 1000°e. The room-temperature magnetic moment of the sample as obtained and after annealing it at various temperatures indicate that the saturation magnetization increases from 1.80 to 72.8 emu/g, while remanent magnetization increases from 0.28 to 25.0 emu/g. Mossbauer spectrum of the sample at room temperature exhibited a doublet with 8(Fe) = 0.33 mrns-l and 6.EQ = 0.78 mms-1 suggesting superparamagnetic nature. However, after annealing at 1000 0 e this doublet got converted into two magnetic sextets with B = 52.4 T and 49.0 T suggesting increase in particle size on annealing. These observations are in conformity with Transmission Electron Microscope (TEM) and X-Ray Diffraction (XRD) results that the particle size increases after annealing the sample at higher temperatures.

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Section: Resultssupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Synthesis of Nanocrystalline Ni0.5Zn0.5Fe2O4 by Aerosol Route and Its Characterization

Singhal¹,

Garg²,

Chandra³

2004

Icame 2003

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“…The fitting of the experimental curves for the theoretical curves was shown in Figures 3(a) and 3(b). 2 Alloy. The current efficiency for electrodeposition of (Ni-Zn)Fe 2 alloy was studied at different current densities ranging from 52 to 204 mA cm −2 at 800 rpm stirring value for bath including zinc sulfate, nickel sulfate, and ammonium ferrous sulfate in Ni : Zn : Fe molar ratio 0.5 : 0.5 : 2 at room temperature.…”

Section: Isrn Nanotechnologymentioning

confidence: 99%

“…In recent years, soft magnetic Ni-Zn ferrite films with good magnetic properties, high resistivity, and low coercivity have critical need for high-frequency applications such as RF broad "band choke band," planar inductors, magnetic sensors, transformers cores, rod antennas, microwaves devices, and telecommunication [1][2][3][4][5][6]. Therefore, numerous deposition techniques are used for synthesis of required ferrites thin films.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Synthesis of Nanocrystalline Ni_0.5Zn_0.5Fe₂O₄ Thin Film from Aqueous Sulfate Bath

Saba

Elsayed

Moharam

et al. 2012

ISRN Nanotechnology

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Nanocrystalline nickel-zinc ferrites Ni 0.5 Zn 0.5 Fe 2 O 4 thin films have been synthesized via the electrodeposition-anodization from the aqueous sulfate bath. The electrodeposited (Ni-Zn)Fe 2 alloy was anodized in aqueous 1 M KOH solution to form the corresponding hydroxides which annealed at different temperatures ranging from 800 to 1000• C for various periods from 1 to 4 h, to get the required ferrite. SEM micrograph of the formed ferrite particles, annealed at 1000• C for 4 h appeared as the octahedral-like structure. A good saturation magnetization of 28.2 emu/g was achieved for Ni 0.5 Zn 0.5 Fe 2 O 4 thin film produced after the aforementioned conditions. The kinetic studies of the crystallization of Ni 0.5 Zn 0.5 Fe 2 O 4 films appeared to be first-order reaction and the activation energy was found to be 10.5 k Joule/mole.

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“…[18][19][20][21][22] Several researchers have reported on Ti, Y, Gd, Pr, Zn, Ni and Dy doped cobalt ferrite. [23][24][25][26][27][28] The present work is focused on the effects of Al 3+ doping on the structural, morphological and elastic properties of aluminium ion doped cobalt ferrite obtained via sol-gel method. The X-ray powder diffraction patterns, the microstructure and the elastic properties are discussed as a function of the Al 3+ doping.…”

Section: Introductionmentioning

confidence: 99%

Al and PEG Effect on Structural and Physicochemical Properties of CoFe2O4

Mostaghni

Abed

2017

Mat. Res.

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In this work, pure and Alumina doped cobalt ferrite nanoparticles CoFe 2−x Al x O 4 (for x = 0.44) have been synthesized by the sol gel method. The influence of alumina doping on the morphological and mechanical properties of CoFe 2 O 4 nano-particles were investigated by means of X-ray powder diffraction (XRD) and rietveld analysis. XRD analysis confirmed that the single phase formation of pure nano particles with the expected cubic inverse spinel structure with Fd3m space group and without any impurity phase. Alumina doping were led to a decrease in the crystallite size, lattice parameter, elastic constants and magnitude of moduli. It is explained on the basis of the replacement of Fe ions with half-filled d-shell (3d 5 ) and larger radius by Al 3+ ions with a completely filled shell (2p 6 ) and smaller radius.

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Mössbauer study of nanocrystalline Ni–Zn ferrite

Cited by 69 publications

References 12 publications

Synthesis of Nanocrystalline Ni0.5Zn0.5Fe2O4 by Aerosol Route and Its Characterization

Synthesis of Nanocrystalline Ni0.5Zn0.5Fe2O4 by Aerosol Route and Its Characterization

Electrochemical Synthesis of Nanocrystalline Ni_0.5Zn_0.5Fe₂O₄ Thin Film from Aqueous Sulfate Bath

Al and PEG Effect on Structural and Physicochemical Properties of CoFe2O4

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Mössbauer study of nanocrystalline Ni–Zn ferrite

Cited by 69 publications

References 12 publications

Synthesis of Nanocrystalline Ni0.5Zn0.5Fe2O4 by Aerosol Route and Its Characterization

Synthesis of Nanocrystalline Ni0.5Zn0.5Fe2O4 by Aerosol Route and Its Characterization

Electrochemical Synthesis of Nanocrystalline Ni0.5Zn0.5Fe2O4 Thin Film from Aqueous Sulfate Bath

Al and PEG Effect on Structural and Physicochemical Properties of CoFe2O4

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Electrochemical Synthesis of Nanocrystalline Ni_0.5Zn_0.5Fe₂O₄ Thin Film from Aqueous Sulfate Bath