Localized spin canting in partially inverted<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">ZnFe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>fine powders

Oliver, S. A.; Hamdeh, Hussein H.; Ho, J. C.

doi:10.1103/physrevb.60.3400

Cited by 119 publications

(92 citation statements)

References 12 publications

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“…(I) Nano-scaled ferrite materials attract considerable research attention due to their cation distribution and applications as dielectric materials 46,66,67,68 They show similar structural properties, but different magnetic, and transport properties. Considering the rich phases of spinel ferrites (TMFe 2 O 4 , TM=Ni, Co, Fe, Mn, Cu, Zn), our results demonstrate the possibility to have a new magnet/semiconductor hybrid system.…”

Section: Discussionmentioning

confidence: 99%

Spinel ferrite nanocrystals embedded inside ZnO: Magnetic, electronic, and magnetotransport properties

Zhou

Potzger

et al. 2009

Phys. Rev. B

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In this paper we show that spinel ferrite nanocrystals (NiFe2O4, and CoFe2O4) can be texturally embedded inside a ZnO matrix by ion implantation and post-annealing. The two kinds of ferrites show different magnetic properties, e.g. coercivity and magnetization. Anomalous Hall effect and positive magnetoresistance have been observed. Our study suggests a ferrimagnet/semiconductor hybrid system for potential applications in magneto-electronics. This hybrid system can be tuned by selecting different transition metal ions (from Mn to Zn) to obtain various magnetic and electronic properties.

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Section: Discussionmentioning

confidence: 99%

Spinel ferrite nanocrystals embedded inside ZnO: Magnetic, electronic, and magnetotransport properties

Zhou

Potzger

et al. 2009

Phys. Rev. B

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“…Iron (III) occupancy of both A and B-sites in nanocrystalline ZnFe 2 O 4 has been extensively proved by Mössbauer spectroscopy [1,2,6,7,8], nuclear magnetic resonance [5], neutron diffraction [3], x-ray absorption [9,10,11,12], and indirectly throughout magnetic measurements [2,3,4,13,14]. To a much lesser extend, Extended X-ray Absorption Fine Structure (EXAFS) studies at Zn K-edge suggest that Zn ions are transferred from its equilibrium position (sites A) to B-sites when the particle size decreases [9,10,11].…”

Section: Introductionmentioning

confidence: 99%

Cationic exchange in nanosizedZnFe2O4spinel revealed by experimental and simulated near-edge absorption structure

et al. 2007

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The non-equilibrium cation site occupancy in nanosized zinc ferrites (6-13 nm) with different degree of inversion (0.2 to 0.4) was investigated using Fe and Zn K-edge x-ray absorption spectroscopy XANES and EXAFS, and magnetic measurements. The very good agreement between experimental and ab-initio calculations on the Zn K-edge XANES region clearly show the large Zntransference that takes place in addition to the well-identified Fe 3+ [B]→Fe 3+ (A) one, without altering the long-range structural order. XANES spectra features as a function of the spinel inversion were shown to depend on the configuration of the ligand shells surrounding the absorbing atom. This XANES approach provides a direct way to sense cationic inversion in these spinel compounds. We also demonstrated that a mechanical crystallization takes place on nanocrystalline spinel that causes an increase of both grain and magnetic sizes and, simultaneously, generates a significant augment of the inversion.

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“…Recently, ZnFe 2 O 4 nanoparticles prepared by various methods, such as traditional ceramic synthesis, aerogel procedure, low-temperature hydroxide co-precipitation and hydrothermal synthesis, have been studied and observed to be ferrimagnetic or superparamagnetic. The origin of the ferrimagnetic properties of ZnFe 2 O 4 and other spinel ferrite nanoparticles was studied using lowtemperature Mössbauer spectrometry with applied magnetic field parallel to the direction of gamma rays [4][5][6][7][8][9]. Large inversion parameters were obtained when the particle size is decreased, and there are spin cantings in both A and B sites.…”

Section: Introductionmentioning

confidence: 99%

Effect of Preparation on Structure and Magnetic Properties of ZnFe₂O₄

Niyaifar¹

2014

Journal of Magnetics

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In this work, Zinc ferrite nanoparticles have been prepared by various methods, conventional (ZC), mechanochemical processing (ZM) and Sol-Gel (ZS) method, to compare their structural and magnetic properties. The cation distribution obtained from XRD shows the degrees of inversions are 4%, 14.8%, and 16.4% from the normal ZnFe 2 O 4 structure. Fourier transform infrared spectroscopy (FT-IR) confirms changes in cation distribution of ZnFe 2 O 4 fabricated by sol-gel and mechanochemical processing. The 57Fe Mössbauer spectra of the samples were recorded at room temperature. The spectra exhibit a line broadening. The magnetic properties of the samples were studied by vibration sample magnetometer (VSM) at room temperature and the results show that the sample ZM has ferrimagnetic behaviour.

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Localized spin canting in partially invertedZnFe2O4fine powders

Cited by 119 publications

References 12 publications

Spinel ferrite nanocrystals embedded inside ZnO: Magnetic, electronic, and magnetotransport properties

Spinel ferrite nanocrystals embedded inside ZnO: Magnetic, electronic, and magnetotransport properties

Cationic exchange in nanosizedZnFe2O4spinel revealed by experimental and simulated near-edge absorption structure

Effect of Preparation on Structure and Magnetic Properties of ZnFe₂O₄

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Localized spin canting in partially invertedZnFe2O4fine powders

Cited by 119 publications

References 12 publications

Spinel ferrite nanocrystals embedded inside ZnO: Magnetic, electronic, and magnetotransport properties

Spinel ferrite nanocrystals embedded inside ZnO: Magnetic, electronic, and magnetotransport properties

Cationic exchange in nanosizedZnFe2O4spinel revealed by experimental and simulated near-edge absorption structure

Effect of Preparation on Structure and Magnetic Properties of ZnFe2O4

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Product

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Effect of Preparation on Structure and Magnetic Properties of ZnFe₂O₄