Magnetic properties and high heating efficiency of ZnFe2O4 nanoparticles

Yelenich, O.V.; Solopan, Sergii; Kolodiazhnyi, Taras; Dzyublyuk, V. V.; Tovstolytkin, A. I.; Belous, A. G.

doi:10.1016/j.matchemphys.2014.03.010

Cited by 39 publications

(16 citation statements)

References 28 publications

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“…Top and bottom diagrams schematically illustrate temperature regions, where either SW-, or NR-mechanism of losses dominates for LF and HF cases, respectively. So, the decrease of x from 0.33 to 0.20 leads to T C reduction from 370 to 309 K. 27 The same trend keeps for La 1-x [7,30,41,43], the use of the methods based on synthesis from nonaqueous solutions or precipitation from microemulsions makes it possible to prevent MNP agglomeration, due to the isolation of nanoparticles from each other in the process of synthesis. For this reason, in this work a method of precipitation from microemulsions was chosen to obtain the MNPs of substituted manganites.…”

Section: Justification Of the Choice Of Mnp Chemical Composition And mentioning

confidence: 77%

Mechanisms of AC losses in magnetic fluids based on substituted manganites

Каліта

Tovstolytkin

Ryabchenko

et al. 2015

Phys. Chem. Chem. Phys.

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The ability to controllably tune the heating efficiency of magnetic nanoparticles in an AC magnetic field is highly desirable for their application as mediators of magnetic hyperthermia. Traditional approaches to understand and govern the behavior of hyperthermia mediators include a combination of quasistatic and high-frequency (∼100 kHz) magnetic measurements with subsequent simulation of underlying processes. In this paper, we draw attention to the frequently overlooked fact that for an ensemble of magnetic nanoparticles, there is no straightforward complementarity between the dynamic characteristics obtained under different experimental conditions, as well as between corresponding underlying processes. This paper analyzes mechanisms of AC losses in a fluid based on magnetic nanoparticles, with special emphasis on the domains of their validity, and shows that the mechanisms may become qualitatively different as experimental conditions change from magnetostatic to high-frequency ones. Further, the work highlights new important features which can result from the employment of the refined approaches to interpret experimental results obtained on magnetic fluids based on La1-xSrxMnO3 (x = 0.22) nanoparticles. The gained knowledge provides necessary guidelines for tailoring the properties of magnetic nanoparticles to the needs of self-controlled magnetic hyperthermia.

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Section: Justification Of the Choice Of Mnp Chemical Composition And mentioning

confidence: 77%

Mechanisms of AC losses in magnetic fluids based on substituted manganites

Каліта

Tovstolytkin

Ryabchenko

et al. 2015

Phys. Chem. Chem. Phys.

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“…The samples with y ≤ 0.06 have higher magnetization and tend to saturate in strong magnetic fields. Detailed analysis of the M ( H ) curves for samples with y = 0–0.06 shows that they can be well fitted by a Langevin function [28] (see inset to Fig. 5), which points towards the superparamagnetic behavior.…”

Section: Resultsmentioning

confidence: 99%

Iron-Doped (La,Sr)MnO3 Manganites as Promising Mediators of Self-Controlled Magnetic Nanohyperthermia

Shlapa¹,

Kulyk

Каліта

et al. 2016

Nanoscale Res Lett

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Fe-doped La0.77Sr0.23Mn1 − yFeyO3 nanoparticles have been synthesized by sol-gel method, and ceramic samples based on them were sintered at 1613 K. Crystallographic and magnetic properties of obtained nanoparticles and ceramic samples have been studied. It has been established that cell volume for nanoparticles increases with growing of iron content, while this dependence displays an opposite trend in the case of ceramic samples. Mössbauer investigations have shown that in all samples, the oxidation state of iron is +3. According to magnetic studies, at room temperature, both nanoparticles and ceramic samples with y ≤ 0.06 display superparamagnetic properties and samples with y ≥ 0.08 are paramagnetic. Magnetic fluids based on La0.77Sr0.23Mn1 − yFeyO3 nanoparticles and aqua solution of agarose have been prepared. It has been established that heating efficiency of nanoparticles under an alternating magnetic field decreases with growing of iron content.

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“…Zinc ferrite (ZnFe2O4) is a spinel oxide that possesses excellent magnetic and electrical properties as well as excellent chemical and thermal stabilities. ZnFe2O4 oxide has received much attention due to its potential applications in detecting gases [4], as an adsorbent material for hot-gas desulfurization [5], in biomedicine [6], for its magnetic, optical and electrical behaviors [7][8][9][10][11] and catalytic application [12,13]. Recently, zinc ferrite has been used as an efficient heterogeneous Fenton catalyst in degrading organic pollutants from an aqueous solution [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Structural Properties and Cation Distribution in Co2+ and Ho3+ Ions Induced Nanocrystalline ZnFe2O4

et al. 2020

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Nanocrystalline CoyZn1-yHozFe2-zO4 (where y = 0.0, 0.25, 0.5, 0.75, 1.00 and z=0.0, 0.03, 0.06, 0.08, 0.1) ferrites were prepared by sol-gel auto combustion method at pH of 8. Samples were obtained by annealing at relatively low temperature 600 C for 4 h and characterized by thermo gravimetric/differential thermal analysis (TG/DTA) all the samples were annealed at 600 C for 4 h. The prepared samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared (FT-IR) spectroscopy. Particle size measured from XRD and TEM are in good agreement with each other. The TEM study reveals the fine particle nature of the ferrites with little agglomerations. The cation distribution suggests that Zn 2+ ion mainly on tetrahedral-A sites, Ho 3+ ions shows strong preference towards octahedral-B site, Co 2+ and Fe 3+ ions are randomly distributed at the tetrahedral-A and octahedral-B site. FT-IR study confirmed two main absorption bonds in the frequency range 400-600 cm-1 , assigned due to the tetrahedral-A and octahedral-B stretching vibrations.

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Magnetic properties and high heating efficiency of ZnFe2O4 nanoparticles

Cited by 39 publications

References 28 publications

Mechanisms of AC losses in magnetic fluids based on substituted manganites

Mechanisms of AC losses in magnetic fluids based on substituted manganites

Iron-Doped (La,Sr)MnO3 Manganites as Promising Mediators of Self-Controlled Magnetic Nanohyperthermia

Structural Properties and Cation Distribution in Co2+ and Ho3+ Ions Induced Nanocrystalline ZnFe2O4

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