Influence of Zn concentration on the structural and magnetic properties of nanocrystalline Cu1−xZnxFe2O4 mixed ferrites synthesized using novel combustion method

Murugesan, C.; Kambhala, Nagaiah; Angappane, S.; Chandrasekaran, G.

doi:10.1016/j.jmmm.2017.07.061

Cited by 18 publications

(7 citation statements)

References 34 publications

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“…The magnetization of the samples increases up to x = 0.2 (44.16 emu/g). The prepared ferrites exhibit superparamagnetic behavior for x ≥ 0.4 concentration of Zn [ 35 ]. Andhare et al [ 27 ] prepared the Co 1-x Zn x Fe 2 O 4 mixed ferrite nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Zinc substitution effect on the structural, spectroscopic and electrical properties of nanocrystalline MnFe2O4 spinel ferrite

Murugesan

Ugendar²,

Okrasa

et al. 2021

Ceramics International

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This paper reports the structural, morphological, spectroscopic, dielectric, ac conductivity, and impedance properties of nanocrystalline Mn 1-x Zn x Fe 2 O 4 . The nanocrystalline Mn–Zn ferrites were synthesized using a solvent-free combustion reaction method. The structural analysis using X-ray diffraction (XRD) pattern reveals the single-phase of all the samples and the Rietveld refined XRD patterns confirmed the cubic-spinel structure. The calculated crystallite size values increase from 8.5 nm to 19.6 nm with the Zn concentration. The surface morphological analysis using field emission scanning electron microscopy and the transmission electron microscopy confirms the nano size of the prepared ferrites. X-ray photoelectron spectroscopy was used to study the ionic state of the atoms present in the samples. Further, the high-resolution Mn 2p, Zn 2p, Fe 2p, and O 1s spectra of Mn 1-x Zn x Fe 2 O 4 does not result in the appearance of new peaks with Zn content, indicating that the Zn substitution does not change the ionic state of Mn, Zn, Fe, and O present in nanocrystalline Mn 1-x Zn x Fe 2 O 4 . The investigated electrical properties show that the dielectric constant, tan δ and ac conductivity gradually decrease with increasing Zn substitution and the sample Mn 0 · 2 Zn 0 · 8 Fe 2 O 4 has the lowest value of conductivity at 303 K. The ac conductivity measured at different temperatures shows the semiconducting nature of the ferrites. The impedance spectra analysis shows that the contribution of grain boundary is higher compared with the grain to the resistance. The obtained results suggest that the Zn substituted manganese ferrite nanoparticles can act as a promising candidate for high-frequency electronic devices applications.

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Section: Introductionmentioning

confidence: 99%

Zinc substitution effect on the structural, spectroscopic and electrical properties of nanocrystalline MnFe2O4 spinel ferrite

Murugesan

Ugendar²,

Okrasa

et al. 2021

Ceramics International

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“…It is found that Fe@Fe‐oxide nanoparticles have a relatively higher M S compared to other reported magnetic nanoparticles. [ 33–49 ]…”

Section: Resultsmentioning

confidence: 99%

“…d) The comparison of magnetic properties between Fe@Fe‐oxide nanoparticles and other reported magnetic nanoparticles. [ 33–49 ]…”

Section: Resultsmentioning

confidence: 99%

“…It is found that Fe@Feoxide nanoparticles have a relatively higher M S compared to other reported magnetic nanoparticles. [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] The hysteresis loop of Fe@Fe-oxide nanoparticles at 5 K is shown in Figure 4a. It is seen that a significant shift in the hysteresis loop of H m = 2322 Oe is observed under the FC condition.…”

Section: Resultsmentioning

confidence: 99%

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Connection Between Intrinsic Interfacial Frozen Spins and Exchange Bias Effect in Core@Shell Iron@Iron‐Oxide Nanoparticles

Hong

Shen

et al. 2023

Physica Status Solidi (b)

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Exchange bias is a common phenomenon that appears at the interfaces between ferromagnetic and ferrimagnetic materials due to the presence of frozen spins. However, systematic quantification of their intrinsic correlation remains to be a challenge. Herein, the exchange bias induced by frozen spins is assumed as the synergy of an effective static magnetic field and an effective anisotropy, and thus the effect of intrinsic frozen spins at core@shell interfaces of iron@iron‐oxide nanoparticles is estimated. It is confirmed that the shift of the hysteresis loop is 2322 Oe and the coercivity increases from 360 to 1590 Oe. Using micromagnetic simulations, such a hysteresis loop is reconstructed by introducing an effective static magnetic field of 7360 Oe and an effective anisotropy of 45 × 103 J m−3. Therefore, a connection between the intrinsic interfacial frozen spins and the exchange bias effect is established from a mesoscale perspective, mediated by the effective magnetic field and effective anisotropy. The results can provide an understanding of exchange bias effect and promote applications of ferromagnetic/ferrimagnetic heterostructures.

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“…Among the various preparation methods developed to produce Zn ferrite nanoparticles, such as reverse micelle [16], sol-gel [17], hydrothermal [11], the coprecipitation is the most used. A big part of literature reports the synthesis of ferrites from nitrate precursors [11,[18][19][20][21][22][23][24][25][26][27][28][29] but special attention is recently given to metallic chlorides precursors [30]- [40] due to the higher solubility in water of the resulted sodium chloride compared to the sodium nitrite [32,33,37,38].…”

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confidence: 99%

Influence of Precipitating Agent Concentration on Nanoparticles Size and Magnetic Properties of Zinc Ferrites

Trandafir¹,

Ciocarlan²,

Pui³

et al. 2020

Rev. Chim.

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A series of Zn ferrite nanoparticles was prepared by varying the concentration of precipitating agent (NaOH) in the range of 1 � 5 M. Carboxymethylcellulose (CMC) was used as capping agent for stabilizing the particles and to prevent agglomeration. The synthesis done at low temperature was followed by a thermal treatment at 500ºC for 6 h in air. The crystallite size determined using Scherer formula ranged between 8 - 10 nm while the nanoparticles average size observed by Transmission Electron Microscopy varied in between 7-10 nm showing that the increase of coprecipitation agent concentration influences the particles growth. Vibrating sample magnetometry confirmed the strong influence that nanoparticles morphology and size play on superparamagnetic properties of Zn ferrite.

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Influence of Zn concentration on the structural and magnetic properties of nanocrystalline Cu1−xZnxFe2O4 mixed ferrites synthesized using novel combustion method

Cited by 18 publications

References 34 publications

Zinc substitution effect on the structural, spectroscopic and electrical properties of nanocrystalline MnFe2O4 spinel ferrite

Zinc substitution effect on the structural, spectroscopic and electrical properties of nanocrystalline MnFe2O4 spinel ferrite

Connection Between Intrinsic Interfacial Frozen Spins and Exchange Bias Effect in Core@Shell Iron@Iron‐Oxide Nanoparticles

Influence of Precipitating Agent Concentration on Nanoparticles Size and Magnetic Properties of Zinc Ferrites

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