Magnetic properties of ZnxFe3−xO4 nanoparticles: A competition between the effects of size and Zn doping level

Modaresi, Nahid; Afzalzadeh, Reza; Aslibeiki, B.; Kameli, P.; Varzaneh, A. Ghotbi; Orúe, I.; Chernenko, V.A.

doi:10.1016/j.jmmm.2019.03.060

Cited by 50 publications

(32 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Slightly smaller values of the K eff were obtained for the zinc substitute magnetite MNPs of the same size and shape. These values of K eff are not consistent with those recently reported on Zn x Fe 3−x O 4 MNPs (0 ≤ x ≤ 0.5) synthesized by the co-precipitation method [ 42 ]. It has to be noted that as the zinc doping level is increased up to x ~ 0.3, the crystalline size of MNPs increases as well, leading to an increase of the K eff [ 42 ].…”

Section: Resultscontrasting

confidence: 97%

“…The FT-IR spectra of either citric acid coated MNPs ( Figure 5 a) or uncoated MNPs ( Supplementary Figure S3a ) are dominated by absorption bands around 560 and 630 cm −1 which are attributed to the stretching vibration mode associated with the Zn 2+ -O and Fe 3+ -O in A site. These two pronounced absorption bands confirm the formation of the spinel structure, characterizing, in particular, the ferrites [ 32 , 42 ]. As indicated by the dotted line in Figure 5 b and Supplementary Figure S3b , the absorption band that appears at 560 cm −1 in the FT-IR spectrum of Fe 3 O 4 shifts progressively towards lower wavenumbers at 557, 554 and 552 cm −1 as the zinc doping is increased from 0.1 to 0.3 and 0.5, respectively.…”

Section: Resultsmentioning

confidence: 88%

“…For x ~ 0.5, the value of M s decreases slightly to 110.1 Am 2 /kg, this value being still higher than that of magnetite MNPs (x = 0) by 31%. It is worth noting that these values of M s are by far the highest reported for zinc doped magnetite MNPs synthesized by the co-precipitation method [ 42 ]. Taking into account that all four types of MNPs display similar morphological and structural properties, the significant enhancement in the M s for zinc doped magnetite MNPs as compared to magnetite MNPs can only be attributed to the location of the divalent Zn 2+ ions at the A sites of the spinel structure.…”

Section: Resultsmentioning

confidence: 90%

See 2 more Smart Citations

Quantitative Analysis of the Specific Absorption Rate Dependence on the Magnetic Field Strength in ZnxFe3−xO4 Nanoparticles

Kerroum

Iacoviță

Baaziz

et al. 2020

IJMS

View full text Add to dashboard Cite

Superparamagnetic ZnxFe3−xO4 magnetic nanoparticles (0 ≤ x < 0.5) with spherical shapes of 16 nm average diameter and different zinc doping level have been successfully synthesized by co-precipitation method. The homogeneous zinc substitution of iron cations into the magnetite crystalline structure has led to an increase in the saturation magnetization of nanoparticles up to 120 Am2/kg for x ~ 0.3. The specific absorption rate (SAR) values increased considerably when x is varied between 0 and 0.3 and then decreased for x ~ 0.5. The SAR values are reduced upon the immobilization of the nanoparticles in a solid matrix being significantly increased by a pre-alignment step in a uniform static magnetic field before immobilization. The SAR values displayed a quadratic dependence on the alternating magnetic field amplitude (H) up to 35 kA/m. Above this value, a clear saturation effect of SAR was observed that was successfully described qualitatively and quantitatively by considering the non-linear field’s effects and the magnetic field dependence of both Brown and Neel relaxation times. The Neel relaxation time depends more steeply on H as compared with the Brown relaxation time, and the magnetization relaxation might be dominated by the Neel mechanism, even for nanoparticles with large diameter.

show abstract

Section: Resultscontrasting

confidence: 97%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 90%

See 1 more Smart Citation

Quantitative Analysis of the Specific Absorption Rate Dependence on the Magnetic Field Strength in ZnxFe3−xO4 Nanoparticles

Kerroum

Iacoviță

Baaziz

et al. 2020

IJMS

View full text Add to dashboard Cite

show abstract

“…As the temperature increased, the Zn 2+ ions might have migrated in the (A) sites, thus reducing the saturation magnetization to 58 emu/g. Our results are in agreement with recent experiments proving that Zn 0.3 Fe 2.7 O 4 MNPs approximately 40 nm in diameter have a saturation magnetization of 89 emu/g at 5 K, which drops to about 40 emu/g at 300 K [47].…”

Section: Resultssupporting

confidence: 93%

Hyperthermia, Cytotoxicity, and Cellular Uptake Properties of Manganese and Zinc Ferrite Magnetic Nanoparticles Synthesized by a Polyol-Mediated Process

et al. 2019

View full text Add to dashboard Cite

Manganese and zinc ferrite magnetic nanoparticles (MNPs) were successfully synthesized using the polyol method in ethylene glycol and were found to have high saturation magnetization values (90–95 emu/g at 4 K) when formed by ~30-nm crystallites assembled in an ~80-nm multicore structure. Hyperthermia data revealed a sigmoidal dependence of the specific absorption rate (SAR) on the alternating magnetic field (AMF) amplitude, with remarkable saturation SAR values in water of ~1200 W/gFe+Mn and ~800 W/gFe+Zn for the Mn and Zn ferrites, respectively. The immobilization of the MNPs in a solid matrix reduced the maximum SAR values by ~300 W/gFe+Mn, Zn for both ferrites. The alignment of the MNPs in a uniform static magnetic field, before their immobilization in a solid matrix, significantly increased their heating performance. Toxicity assays performed in four cell lines revealed a lower toxicity for the Mn ferrites, while in the case of the Zn ferrites, only ~50% of cells were viable upon their incubation for 24 h with 0.2 mg/mL of MNPs. Cellular uptake experiments revealed that both MNPs entered the cells in a time-dependent manner, as they were found initially in endosomes and later in the cytosol. All of the studied cell lines were more sensitive to the ZnFe2O4 MNPs.

show abstract

“…Ferrimagnetic material is one that possesses unequal opposing magnetic moments which allow such materials to retain spontaneous magnetization. Ferrites are generally classified into two types: hard ferrites [7,8] and soft ferrites [9][10][11][12][13][14][15][16][17]. Hard ferrites have high coercivity and such materials are difficult to magnetize.…”

Section: Introductionmentioning

confidence: 99%

A review on MnZn ferrites: Synthesis, characterization and applications

Thakur

Chahar

Taneja

et al. 2020

Ceramics International

270

View full text Add to dashboard Cite

Researchers are taking great interest in the synthesis and characterization of MnZn ferrites due to their wide range of applications in many areas. MnZn ferrites are a class of soft magnetic materials that have very good electrical, magnetic and optical properties. The properties of MnZn ferrites include high value of resistivity, permeability, permittivity, saturation magnetization, low power losses and coercivity. The above mentioned advantageous features of MnZn ferrites make them suitable for the use in various applications. In biomedical field these ferrites are used for cancer treatment and MRI. MnZn ferrites are also used in electronic applications for making transformers, transducers and inductors. These ferrites are also used in magnetic fluids, sensors and biosensors. MnZn ferrite is highly useful material for several electrical and electronic applications. It finds applications in almost every household appliances like mobile charger, LED bulb, TV, refrigerator, juicer mixer, washing machine, iron, microwave oven, mobile, laptop, desktop, printer and so on. Therefore, the present review focuses on different techniques for synthesis of MnZn ferrites in literature, their characterization tools, effect of doping on the properties of MnZn ferrite and finally we will discuss about their applications.

show abstract

Magnetic properties of ZnxFe3−xO4 nanoparticles: A competition between the effects of size and Zn doping level

Cited by 50 publications

References 78 publications

Quantitative Analysis of the Specific Absorption Rate Dependence on the Magnetic Field Strength in ZnxFe3−xO4 Nanoparticles

Quantitative Analysis of the Specific Absorption Rate Dependence on the Magnetic Field Strength in ZnxFe3−xO4 Nanoparticles

Hyperthermia, Cytotoxicity, and Cellular Uptake Properties of Manganese and Zinc Ferrite Magnetic Nanoparticles Synthesized by a Polyol-Mediated Process

A review on MnZn ferrites: Synthesis, characterization and applications

Contact Info

Product

Resources

About