Tunable magnetic properties of Ni-doped CoFe2O4 nanoparticles prepared by the sol–gel citrate self-combustion method

Omelyanchik, Alexander; Singh, Gurvinder; Волочаев, М. Н.; Sokolov, A. E.; Rodionova, Valeria; Peddis, Davide

doi:10.1016/j.jmmm.2018.12.064

Cited by 41 publications

(22 citation statements)

References 30 publications

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“…Since the maximal acquired field was not sufficient to fully saturate the sample, the value of saturation magnetization was extrapolated with the fitting of the high-field region using the Law of Approach to Saturation (LAS): M(H) = M S (1 − A/H − B/H 2 ) where A and B are fitting parameters [ 39 ]. The Equation (2) was applied previously to estimate M S in different ferrite nanoparticles [ 34 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

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Boosting Magnetoelectric Effect in Polymer-Based Nanocomposites

et al. 2021

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Polymer-based magnetoelectric composite materials have attracted a lot of attention due to their high potential in various types of applications as magnetic field sensors, energy harvesting, and biomedical devices. Current researches are focused on the increase in the efficiency of magnetoelectric transformation. In this work, a new strategy of arrangement of clusters of magnetic nanoparticles by an external magnetic field in PVDF and PFVD-TrFE matrixes is proposed to increase the voltage coefficient (αME) of the magnetoelectric effect. Another strategy is the use of 3-component composites through the inclusion of piezoelectric BaTiO3 particles. Developed strategies allow us to increase the αME value from ~5 mV/cm·Oe for the composite of randomly distributed CoFe2O4 nanoparticles in PVDF matrix to ~18.5 mV/cm·Oe for a composite of magnetic particles in PVDF-TrFE matrix with 5%wt of piezoelectric particles. The applicability of such materials as bioactive surface is demonstrated on neural crest stem cell cultures.

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Section: Methodsmentioning

confidence: 99%

“…where A and B are fitting parameters [39]. The Equation (2) was applied previously to estimate M S in different ferrite nanoparticles [34,40].…”

Section: Structural and Magnetic Characterizationmentioning

confidence: 99%

Boosting Magnetoelectric Effect in Polymer-Based Nanocomposites

et al. 2021

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“…Samples of MNPs were prepared by the SGAC method described in detail elsewhere [37,42]. The metal salts Fe(NO 3 ) 3 •9H 2 O (Carlo Erba Reagenti SpA, Cornaredo, Italy), Co(NO 3 ) 2 •6H 2 O (Scharlab S.L., Barcelona, Spain) and Zn(NO 3 ) 2 •6H 2 O (Merck KGaA, Darmstadt, Germany) were used without future purification.…”

Section: Nanoparticles Synthesismentioning

confidence: 99%

Green Synthesis of Co-Zn Spinel Ferrite Nanoparticles: Magnetic and Intrinsic Antimicrobial Properties

et al. 2020

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Spinel ferrite magnetic nanoparticles have attracted considerable attention because of their high and flexible magnetic properties and biocompatibility. In this work, a set of magnetic nanoparticles of cobalt ferrite doped with zinc was synthesized via the eco-friendly sol-gel auto-combustion method. Obtained particles displayed a room-temperature ferromagnetic behavior with tuned by chemical composition values of saturation magnetization and coercivity. The maximal values of saturation magnetization ~74 Am2/kg were found in cobalt ferrite nanoparticles with a 15–35% molar fraction of cobalt replaced by zinc ions. At the same time, the coercivity exhibited a gradually diminishing trend from ~140 to ~5 mT whereas the concentration of zinc was increased from 0 to 100%. Consequently, nanoparticles produced by the proposed method possess highly adjustable magnetic properties to satisfy the requirement of a wide range of possible applications. Further prepared nanoparticles were tested with bacterial culture to display the influence of chemical composition and magnetic structure on nanoparticles-bacterial cell interaction.

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“…The ferrites CoFe 2 O 4 (CFO) and NiFe 2 O 4 (NFO) were chosen due to the increasing interest in their applications (e.g., biomedicine, catalysis, etc. [26,27]) as well as the significant difference between the magnetocrystalline anisotropy, K V NFO = −6.2 × 10 3 J/m 3 and K V CFO = 2 × 10 5 J/m 3 , and the relatively high value of their magnetisation M S (M S CFO = 88 A•m 2 /kg and M S NFO = 55 A•m 2 /kg) [28,29]. While most works deal with iron oxides or Mn/Zn substituted ferrites as a soft phase, only a few works are devoted to nickel ferrite in core/shell systems [4,14,30], although nickel ferrite being a promising material for catalysis [31] and spintronics [32] applications.…”

Section: Introductionmentioning

confidence: 99%