Magnetic Properties Analysis of Rare-Earth Substituted Nickel Zinc Ferrites

Šoka, Martin; Ušáková, Mariana; Ušák, Elemı́r; Dosoudil, Rastislav; Lokaj, J.

doi:10.1109/tmag.2013.2284053

Cited by 13 publications

(11 citation statements)

References 12 publications

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“…The total magnetization decreases with an increasing La 3+ concentration, thus it proves that the substitution of paramagnetic lanthanum ion into ferromagnetic iron ions in spinel does not improve the magnetic properties of the synthesized nanoparticles [72]. …”

Section: Resultsmentioning

confidence: 99%

Influence of La3+ Substitution on Structure, Morphology and Magnetic Properties of Nanocrystalline Ni-Zn Ferrite

et al. 2017

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Lanthanum substituted Ni-Zn ferrite nanoparticles (Ni0.5Zn0.5LaxFe1-xO4; 0.00 ≤x≤ 1.00) synthesized by sol-gel method were presented. X-ray diffraction patterns reveal the typical single phase spinel cubic ferrite structure, with the traces of secondary phase for lanthanum substituted nanocrystals. In addition, the structural analysis also demonstrates that the average crystallite size varied in the range of 21–25 nm. FTIR spectra present the two prominent absorption bands in the range of 400 to 600 cm-1 which are the fingerprint region of all ferrites. Surface morphology of both substituted and unsubstituted Ni-Zn ferrite nanoparticle samples was studied using FESEM technique and it indicates a significant increase in the size of spherical shaped particles with La3+ substitution. Magnetic properties of all samples were analyzed using vibrating sample magnetometer (VSM). The results revealed that saturation magnetization (Ms) and coercivity (Hc) of La3+ substituted samples has decreased as compared to the Ni-Zn ferrite samples. Hence, the observed results affirm that the lanthanum ion substitution has greatly influenced the structural, morphology and magnetic properties of Ni-Zn ferrite nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Influence of La3+ Substitution on Structure, Morphology and Magnetic Properties of Nanocrystalline Ni-Zn Ferrite

et al. 2017

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“…In contrast, the resonance frequency f r (at which µ reaches its maximum value) increases from 175 (for composite without RE substitution) to 603 MHz (for composite with RE = La), which implies that the µ variation of Ni 0.42 Zn 0.58 RE 0.02 Fe 1.98 O 4 /PVC to some extent complies with the Snoek's law of spinel ferrite/polymer composite materials. 3,8 The measured relaxation type of frequency dispersion of permeability, which is typical for ferrite/polymer composite systems, is related to two fundamental magnetizing mechanisms, namely the domain wall motion and the rotation of magnetization vectors in domains. 9 The variation of µ values with the change of RE substituent in prepared composite samples is similar to that observed in bulk ferrites 2,3 and may result from the following reasons; firstly, RE substitution results in the decrease of the (post-sintering) density as well as of the crystallite size (and therefore also grain size) of ferrite filler, both of which hinder the domain wall motion.…”

Section: A Ferritesmentioning

confidence: 99%

Influence of iron substitution by selected rare-earth ions on the properties of NiZn ferrite fillers and PVC magneto-polymer composites

et al. 2017

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ARTICLES YOU MAY BE INTERESTED INEffect of lanthanum substitution on structural and magnetic properties of nickel zinc ferrites AIP Advances 8, 047802 (2018) Nickel-zinc ferrites are very important soft magnetic materials from the point of view of diverse technical applications (such as, e.g., various electronic devices and components) for their high magnetic permeability and permittivity, low core loss, high resistivity, high Curie temperature as well as mechanical strength and chemical stability. Due to their good absorbing properties, they can be used as microwave absorbing and shielding materials with the aim of decreasing the environmental pollution caused by non-ionizing microwave radiation. The ferrite material incorporated into the polymer matrix creates qualitatively new magneto-polymer composite material taking benefits from both components. The properties typical for polymers (elasticity, mouldability, etc.) are combined with good high-frequency magnetic parameters, thus allowing to utilize these materials, e.g., in high-frequency applications where especially flexibility of composite materials plays a key role. Small amounts of selected rare-earth (RE) ions, in particular Y 3+ , La 3+ , Eu 3+ and Gd 3+ have been embedded into the nickel-zinc ferrite that has been used as the magnetic filler in magnetic polymer composites with polyvinylchloride (PVC) acting as the polymeric matrix. The effect of various types of rare-earth ions on the structural as well as quasi-static and dynamic (electro)magnetic properties of the ferrite fillers as well as ferrite/PVC composites, in particular the frequency dispersion of the complex permeability, has been studied. © 2017 Author(s)

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“…Recently, the influence of Eu 3+ rare-earth (RE) ions on structural, electrical, and magnetic properties of ferrites was investigated by many researchers [1][2][3]. In this work, the effect of Eu substitution of Fe on the magnetic properties of NiZn ferrites was studied.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason Eu was chosen as the substituent, since some other our studies proved Eu (along with Gd and La) as a good agent important for the increase of the Curie temperature, in case of Eu even linear with increase of substituting amount x, see e.g. [3,6].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of Ni_{0.3}Zn_{0.7}Fe_2O_4 Ferrites with Iron Ions Partly Substituted by Europium

et al. 2017

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This work is devoted to the study of the impact of the substitution of iron by Eu on the properties of magnetically soft Ni0.3Zn0.7EuxFe2−xO4 ferrites aimed at enhancement of the knowledge related to the behavior of such materials in dependence on the amount of iron substitution. Our latest studies focused on the materials having similar chemical composition gave a hint of some possible approaches to manage the resulting magnetic properties in a precisely controlled way by the combination of several factors; choice of initial chemical composition of non-substituted ferrite, selection of substituted and substituting element, variations of final chemical composition, modifications of fabrication technology (sintering temperature and time), etc.

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Magnetic Properties Analysis of Rare-Earth Substituted Nickel Zinc Ferrites

Cited by 13 publications

References 12 publications

Influence of La3+ Substitution on Structure, Morphology and Magnetic Properties of Nanocrystalline Ni-Zn Ferrite

Influence of La3+ Substitution on Structure, Morphology and Magnetic Properties of Nanocrystalline Ni-Zn Ferrite

Influence of iron substitution by selected rare-earth ions on the properties of NiZn ferrite fillers and PVC magneto-polymer composites

Magnetic Properties of Ni_{0.3}Zn_{0.7}Fe_2O_4 Ferrites with Iron Ions Partly Substituted by Europium

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