High-field Mössbauer study of manganese-zinc ferrites

Morrish, A. H.; Clark, Paul

doi:10.1103/physrevb.11.278

Cited by 100 publications

(33 citation statements)

References 20 publications

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“…Mn x Zn 1−x Fe 2 O 4 belongs to the group of cubic spinel structures with magnetic ions Fe 3+ , and Fe 2+ distributed in octahedral and tetrahedral sites, depending on the x-value (see Table I) [4]. The magnetic properties of the ferrite nanoparticles are found to undergo changes because of superparamagnetism, surface spin eects, and cation distribution, which depends mainly on the stoichiometry and synthesis method [5,6].…”

Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Features of Mn_1-xZn_xFe₂O₄Nanoparticles

Mendoza

Prado²,

Almanza

2012

Acta Phys. Pol. A

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This paper reports on the magnetic properties of Mn1−xZnx-ferrite nanoparticles. Dierent x compositions of the magnetic material have been considered. Field-and temperature-dependent magnetization curves and electron paramagnetic resonance (EPR) at dierent temperatures were used to reveal the magnetic properties of the samples. For x = 0.5, the EPR spectra consist of a single resonance signal, strongly symmetrical, with g = 3.25 close to 2073 G, and an asymmetric line corresponding to g = 4.4 for x = 0. The asymmetry is attributed to a random distribution of the anisotropy in the system, with perpendicular and parallel modes, giving information about the eective anisotropy of the system. For high concentrations, the resonant eld shifts to 2875 G. Magnetization measurements as function of temperature at 60 Oe according to the standard zero eld cooling (ZFC) and eld cooling (FC) procedures are reported. The behavior of eld cooling magnetization (MFC) at low temperatures evidences the presence of strong interparticles interactions.

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Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Features of Mn_1-xZn_xFe₂O₄Nanoparticles

Mendoza

Prado²,

Almanza

2012

Acta Phys. Pol. A

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“…The effect of substitution of Fe 3+ by Cr 3+ in NiFe 2 O 4 spinel ferrites has received a lot of attention by our group and other workers [1][2][3]. Our results, based on the cation distributions driven from the area under the Mössbauer resonance curve of tetrahedral and octahedral sites, revealed that the compounds are gradually transferred from a perfect inverse spinel to partially normal spinel structure [4].…”

Section: Introductionmentioning

confidence: 52%

Structural characterization and magnetic properties of NiMg3x/2Cr0.9Fe1.1 − x O4

et al. 2008

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Magnesium-substituted nickel-chrome ferrites have been studied using X-ray diffraction and Mössbauer spectroscopy. A single cubic spinel phase was obtained in the range 0.0 ≤ x ≤ 0.4. The lattice parameter was found to decrease with the increase of Mg concentration. The Mössbauer spectra measured at 295 and 78 K of all samples showed magnetic patterns interpreted in term of the tetrahedral and octahedral sites occupancies. The magnetic hyperfine field of both sites decrease with the increase of the Mg concentration. The magnetic properties as a function of the Mg concentration have been explained on the basis of the cation distribution among the two crystallographic sites driven from the Mössbauer measurements.

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“…Although all sites were labeled by inspecting their populations, there is further support from X-ray diffraction to this labeling. It is reported that the Fe-O bonds of the A-sites are about 0.05 Å smaller than those of the B sites [10]. The origin of the HMF in this ferrite is the magnetic moment of the unpaired transition metal 3d electrons, coupled by the superexchange interaction via the oxygen ions separating them.…”

Section: Resultsmentioning

confidence: 98%

Effect of preparation conditions on chemical order and magnetic properties in MnFe2O4 and MnGa1Fe1O4

2006

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Effect of preparation conditions on structural and magnetic properties of Mn and Mn-Ga spinels was investigated by Mössbauer spectroscopy and magnetization measurements. These properties were found to be significantly dependent on the quenching temperature of the samples. Evidently, quenching from elevated temperatures enhanced the magnetization of the spinels due to changes in the chemical short range order.

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High-field Mössbauer study of manganese-zinc ferrites

Cited by 100 publications

References 20 publications

Structural and Magnetic Features of Mn_1-xZn_xFe₂O₄Nanoparticles

Structural and Magnetic Features of Mn_1-xZn_xFe₂O₄Nanoparticles

Structural characterization and magnetic properties of NiMg3x/2Cr0.9Fe1.1 − x O4

Effect of preparation conditions on chemical order and magnetic properties in MnFe2O4 and MnGa1Fe1O4

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High-field Mössbauer study of manganese-zinc ferrites

Cited by 100 publications

References 20 publications

Structural and Magnetic Features of Mn1-xZnxFe2O4Nanoparticles

Structural and Magnetic Features of Mn1-xZnxFe2O4Nanoparticles

Structural characterization and magnetic properties of NiMg3x/2Cr0.9Fe1.1 − x O4

Effect of preparation conditions on chemical order and magnetic properties in MnFe2O4 and MnGa1Fe1O4

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Structural and Magnetic Features of Mn_1-xZn_xFe₂O₄Nanoparticles

Structural and Magnetic Features of Mn_1-xZn_xFe₂O₄Nanoparticles