The effect of divalent ions of zinc and strontium substitution on the structural and magnetic properties on the cobalt site in cobalt ferrite

Imanipour, Parvin; Hasani, Saeed; Afshari, Mehdi; Sheykh, Shiva; Seifoddini, Amir; Jahanbani-Ardakani, Khadijeh

doi:10.1016/j.jmmm.2020.166941

Cited by 34 publications

(13 citation statements)

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“…It is reported that Zn [ 42 , 43 , 44 ] and V [ 43 , 45 ] can strongly affect the structural and physical properties of cobalt ferrite. Substitution of Zn 2+ ion on the Fe- or/and Co- site in cobalt ferrite considerably was reported [ 27 , 42 , 46 , 47 ]. For instance, Kumar et al [ 41 ] studied the substitution of Zn 2+ at the Fe site of CoZn x Fe 2−x O 4 nanoparticles and found that the saturation magnetization and magnetocrystalline anisotropy are increased for x ≥ 0.15, but the coercivity is decreased by adding Zn 2+ .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Zinc and Vanadium Co-Substituted CoFe2O4 Nanoparticles Synthesized by Using the Sol-Gel Auto-Combustion Method

et al. 2022

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In recent years, cobalt ferrite has attracted considerable attention due to its unique physical properties. The present study aimed to produce cobalt ferrite magnetic nanoparticles doped with zinc and vanadium using the sol-gel auto-combustion method. For this purpose, Co1-xZnxFe2-yVyO4 (where x = 0.0, 0.1, 0.2, 0.5 and y = 0.00, 0.05, 0.15, 0.25) precursors were calcined at 800 °C for 3h. The prepared samples were characterized with the X-ray diffraction (XRD) method in combination with Rietveld structure refinement, field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), and vibrating sample magnetometery (VSM). The XRD patterns confirmed the formation of crystalline spinel structure for all samples. However, the diffraction peaks of hematite and iron vanadium oxide phases were observed in the patterns of some doped samples. The average crystallite size for all the synthesized samples was found to be in the range of ~45–24 nm, implying that it decreased by simultaneously doping cobalt ferrite with Zn and V. The FT-IR spectrum confirmed the formation of the spinal structure of ferrite through the observed vibrational bands assigned to the tetrahedral (υ2) and octahedral (υ1) interstitial complexes in the spinel structure. The FE-SEM images showed that morphology, average grain size, and agglomeration of the synthesized powders were affected by doping, which was due to the interactions of the magnetic surface of nanoparticles. The VSM curves demonstrated that saturation magnetization and coercivity values changed in the range of 30–83 emu/g and from 27–913 Oe, respectively. These changes occurred due to the alteration in cation distribution in the spinel structure. This can be attributed to the change in superexchange interactions between magnetic ions by co-substitution of Zn and V ions in Cobalt ferrite and the changes in magnetocrystalline anisotropy.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Zinc and Vanadium Co-Substituted CoFe2O4 Nanoparticles Synthesized by Using the Sol-Gel Auto-Combustion Method

et al. 2022

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“…The decrease of M S values with increasing dopant ions content and decreasing particle size is due to the surface anisotropy of nanoferrites, while the decrease of H C values is the result of some structural defects, such as dislocations, grain boundaries and anisotropy. The obtained results recommended the Zn-Sr co-doped Co ferrite as excellent candidate for various applications such as information storage devices, contrast agents in magnetic resonance imaging and gas sensors [23].…”

Section: Applications Of Magnetic Propertiesmentioning

confidence: 82%

“…Co ferrite is well-known magnetic nanomaterial with high H C and M S . The M S , H C , T C and anisotropy constant (K) of Co ferrite decrease by doping with nonmagnetic ions decrease the hard-magnetic behavior and change the ferromagnetic to superparamagnetic behavior, leading to various applications [14,23,24].…”

Section: Applications Of Magnetic Propertiesmentioning

confidence: 99%

“…In The magnetic properties of Co 1−x−y Sr x Zn y Fe 2 O 4 (x = 0.0, 0.01, 0.05, 0.3 and y = 0.0, 0.05, 0.1, 0.4, 0.5, 0.7) NPs synthetized by spontaneous gel autocombustion (Pechini) technique were strongly influenced by the presence of both dopant ions, resulting in a superparamagnetic behavior [23]. The decrease of M S values with increasing dopant ions content and decreasing particle size is due to the surface anisotropy of nanoferrites, while the decrease of H C values is the result of some structural defects, such as dislocations, grain boundaries and anisotropy.…”

Section: Applications Of Magnetic Propertiesmentioning

confidence: 99%

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Progress, Challenges and Opportunities in Divalent Transition Metal-Doped Cobalt Ferrites Nanoparticles Applications

Cadar¹,

Dippong²,

Senila³

et al. 2020

Advanced Functional Materials

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Engineered nanomaterials with tailored properties are highly required in a wide range of industrial fields. Consequently, the researches dedicated to the identification of new applications for existing materials and to the development of novel promising materials and cost effective, eco-friendly synthesis methods gained considerable attention in the last years. Cobalt ferrite is one of the nanomaterials with a wide application range due to its unique properties such as high electrical resistivity, negligible eddy current loss, moderate saturation magnetization, chemical and thermal stability, high Curie temperature and high mechanical hardness. Moreover, its structural, magnetic and electrical properties can be tailored by the selection of preparation route, chemical composition, dopant ions and thermal treatment. This chapter presents the recent applications of nanosized cobalt ferrites doped or co-doped with divalent transition ions such as Zn 2+ , Cu 2+ , Mn 2+ , Ni 2+ , Cd 2+ obtained by various synthesis methods in ceramics, medicine, catalysis, electronics and communications.

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“…2. This means that for small La 3+ content, up to the nanoferrite with x = 0.09, the rates of nucleation and growth steps increase producing large size for crystallites [23]. Therefore, the high concentrations of La 3+ ions (x = 0.12 and 0.15) resort at grain boundaries, producing grain boundaries pinning, and interns shackle grain growth; resulting decreasing crystallite size trend for these two nanoferrite samples.…”

Section: Xrd Analysismentioning

confidence: 95%

Enhancing the Magnetization, Dielectric Loss and Photocatalytic Activity of Co-cu Ferrite Nanoparticles Via the Substitution of Rare Earth Ions

Abdo

Mansour

Al-Hazmi

et al. 2021

Preprint

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This study reports the impact of lanthanum substituted Co-Cu ferrite nanoparticles on the RhB dye disposal. Moreover, a complete investigation for the structural, magnetic and optical properties for Co0.5Cu0.5LaxFe2-xO4 (CCL) nanoferrites was executed. These nanocrystals synthesized via a combustion approach with a peculiar lattice parameter behavior; which discussed through three hypotheses. STEM-EDX micrographs of some selective samples confirm the nanocrystalline nature with presence of all constituents’ chemical elements CCL nanoferrites. The saturation magnetization of CCL nanoferrites was tuned with La3+ ions substitution. Contrary to the expected results, anisotropy constant introduced a decrement behavior with La/Fe substitution process. The microwave frequency (ωM) values for all CCL nanoparticles are in the range 11.87 GHz–9.46 GHz. The band gap has a peculiar behavior; a red shift and followed by a blue one. Through photodegradation testing, we explicate the RhB degradation mechanisms over our CCL nanoferrites. The nanoferrite Co0.5Cu0.5La0.15Fe1.85O4 has a moderate saturation magnetization, highest coercivity, and lowest loss which is a suitable candidate for data recording applications, furthermore can be utilized as a photocatalyst for RhB effluents removal with degradation efficiency 94.50% at 180 min solar radiation.

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The effect of divalent ions of zinc and strontium substitution on the structural and magnetic properties on the cobalt site in cobalt ferrite

Cited by 34 publications

References 78 publications

Synthesis and Characterization of Zinc and Vanadium Co-Substituted CoFe2O4 Nanoparticles Synthesized by Using the Sol-Gel Auto-Combustion Method

Synthesis and Characterization of Zinc and Vanadium Co-Substituted CoFe2O4 Nanoparticles Synthesized by Using the Sol-Gel Auto-Combustion Method

Progress, Challenges and Opportunities in Divalent Transition Metal-Doped Cobalt Ferrites Nanoparticles Applications

Enhancing the Magnetization, Dielectric Loss and Photocatalytic Activity of Co-cu Ferrite Nanoparticles Via the Substitution of Rare Earth Ions

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