Magnetic properties of CoFe2O4 nanoparticles prepared by thermal treatment of ball-milled precursors

Eshraghi, M.; Kameli, P.

doi:10.1016/j.cap.2010.08.032

Cited by 46 publications

(10 citation statements)

References 27 publications

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“…an anode of a Li-ion battery made of NiFe 2 O 4 nanofibers can assist the electrochemical reaction since electrolytes can easily access into the anode and the empty space of pores can accommodate the volume change during the conversion reaction, resulting in a high discharge capacity. In addition, it is reported that magnetization of ferrite nanofibers can be increased to a higher value than that of nanoparticles [19,20]. Therefore, it is of great interest to study the magnetic properties of the inverse spinel ferrite of NiFe 2 O 4 nanofibers as promising ferromagnetic materials for applications [21].…”

Section: Introductionmentioning

confidence: 98%

Fabrication and magnetic properties of NiFe2O4 nanofibers obtained by electrospinning

Saensuk

Phokha

Bootchanont

et al. 2015

Ceramics International

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Section: Introductionmentioning

confidence: 98%

Fabrication and magnetic properties of NiFe2O4 nanofibers obtained by electrospinning

Saensuk

Phokha

Bootchanont

et al. 2015

Ceramics International

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“…Dielectric loss arises when the polarization creeps with the applied alternating field which is caused by the impurities and imperfections in the crystal. Peaking behavior is explained by the Rezlescu model [28]. According to this model, the peaking behavior occurs when the frequency of charge hopping between the Fe 2+ and Fe 3+ absolutely matches with the frequency of the externally applied field.…”

Section: Resultsmentioning

confidence: 99%

Substitution effect of Y3+ ions on the structural, magnetic and electrical properties of cobalt ferrite nanoparticles

Satpute¹,

Wadgane²,

Desai³

et al. 2020

Cerâmica

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Y3+-doped cobalt ferrite nanoparticles, CoYxFe2-xO4 (x=0.00, 0.05, 0.10, 0.15), were synthesized using the sol-gel auto-combustion technique. Single-phase cubic spinel structure was confirmed by the X-ray diffraction technique. The lattice parameter increased with the increase of Y3+ content in the cobalt ferrite and varied from 8.3876 to 8.4271 Å. FE-SEM images showed that the samples had distinct crystalline nanoparticles of spherical shape with small agglomeration. EDAX results showed good agreement with the particularized composition. Magnetic measurement using a vibrating sample magnetometer (VSM) recorded a reduction in saturation magnetization (Ms) and coercivity (Hc) by Y3+ substitution. The values of Ms and Hc ranged from 66.61 to 17.52 emu/g and 1168.9 to 801.9 Oe, respectively. The electrical properties of Y3+-substituted cobalt ferrite were studied by measuring the dielectric constant and loss. With increasing frequency, the value of the dielectric constant decreased, as a natural behavior of the ferrite material.

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“…5 , the values of magnetic saturation ( M s ) and the coercivity ( H ci ) for CoFe 2 O 4 are 61.7 emu g − 1 and 1536.8 Oe, respectively. According to a previous study, the samples with bigger grain sizes possess higher value of M s [ 42 ]. In this work, the relatively high M s value for CoFe 2 O 4 compared with several literatures should be attributed to the big crystalline grain size as confirmed from TEM images [ 43 – 45 ].…”

Section: Resultsmentioning

confidence: 99%

The Fabrication and High-Efficiency Electromagnetic Wave Absorption Performance of CoFe/C Core–Shell Structured Nanocomposites

Wan

Luo

et al. 2018

Nanoscale Res Lett

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CoFe/C core–shell structured nanocomposites (CoFe@C) have been fabricated through the thermal decomposition of acetylene with CoFe2O4 as precursor. The as-prepared CoFe@C was characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, transmission electron microscopy, and thermogravimetric analysis. The results demonstrate that the carbon shell in CoFe@C has a poor crystallization with a thickness about 5–30 nm and a content approximately 48.5 wt.%. Due to a good combination between intrinsic magnetic properties and high-electrical conductivity, the CoFe@C exhibits not only excellent absorption intensity but also wide frequency bandwidth. The minimum RL value of CoFe@C can reach − 44 dB at a thickness of 4.0 mm, and RL values below − 10 dB is up to 4.3 GHz at a thickness of 2.5 mm. The present CoFe@C may be a potential candidate for microwave absorption application.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2474-9) contains supplementary material, which is available to authorized users.

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Magnetic properties of CoFe2O4 nanoparticles prepared by thermal treatment of ball-milled precursors

Cited by 46 publications

References 27 publications

Fabrication and magnetic properties of NiFe2O4 nanofibers obtained by electrospinning

Fabrication and magnetic properties of NiFe2O4 nanofibers obtained by electrospinning

Substitution effect of Y3+ ions on the structural, magnetic and electrical properties of cobalt ferrite nanoparticles

The Fabrication and High-Efficiency Electromagnetic Wave Absorption Performance of CoFe/C Core–Shell Structured Nanocomposites

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