Synthesis of cobalt ferrite with enhanced magnetostriction properties by the sol−gel−hydrothermal route using spent Li-ion battery

Lu, Yong; Xi, Yuebin; Xi, Guoxi; Feng, Yong

doi:10.1016/j.jallcom.2016.04.092

Cited by 70 publications

(20 citation statements)

References 46 publications

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“…Another way to tune magnetostrictive properties of CoFe 2 O 4 is by substitution of the Fe atoms by Mg, Al, Ti, Mn, Ni, Cu, Zn, Ga, Zr, Nb, In, etc., or even rare-earth elements [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Moreover, there is an increasing interest in synthesizing cobalt ferrite from recycled Li-ion batteries to use it in magnetostrictive applications [25,[34][35][36]. Hence, research in cobalt ferrites is very active, with a special focus on tuning their magnetostrictive properties.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

et al. 2018

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Applications of magnetostrictive materials commonly involve the use of the dynamic deformation, i.e., the piezomagnetic effect. Usually, this effect is described by the strain derivative ∂λ=∂H, which is deduced from the quasistatic magnetostrictive curve. However, the strain derivative might not be accurate to describe dynamic deformation in semihard materials as cobalt ferrite (CFO). To highlight this issue, dynamic magnetostriction measurements of cobalt ferrite are performed and compared with the strain derivative. The experiment shows that measured piezomagnetic coefficients are much lower than the strain derivative. To point out the direct application of this effect, low-frequency magnetoelectric (ME) measurements are also conducted on bilayers CFO=PbðZr; TiÞO 3 . The experimental data are compared with calculated magnetoelectric coefficients which include a measured dynamic coefficient and result in very low relative error (<5%), highlighting the relevance of using a piezomagnetic coefficient derived from dynamic magnetostriction instead of a strain derivative coefficient to model ME composites. The magnetoelectric effect is then measured for several amplitudes of the alternating field H ac , and a nonlinear response is revealed. Based on these results, a trilayer CFO/PbðZr; TiÞO 3 /CFO is made exhibiting a high magnetoelectric coefficient of 578 mV=A (approximately 460 mV=cm Oe) in an ac field of 38.2 kA=m (about 48 mT) at low frequency, which is 3 times higher than the measured value at 0.8 kA=m (approximately 1 mT). We discuss the viability of using semihard materials like cobalt ferrite for dynamic magnetostrictive applications such as the magnetoelectric effect.

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Section: Introductionmentioning

confidence: 99%

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

et al. 2018

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“…In the last decade, transparent conductive oxides (TCO) have gained considerable interest in the research community due to their intriguing properties, they combine electrical conductivity and optical transparency in the visible range. These properties have attracted the attention for using them in optoelectronic devices such as photovoltaic solar cells, electrochromic sensor 1,2 .…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and electrical properties of Ni-doped Co3O4 prepared via Sol-Gel technique

et al. 2018

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In this article, Nickel doped Cobalt oxide thin films and powders have been prepared on glass substrates using sol gel based dip coating process in order to investigate their optical, structural and electrical properties. The Ni concentration was changed from 0 to 9 wt(%).The synthesized samples were characterised by Ultraviolete visible analysis, X-ray diffraction, Fourier transform infrared spectroscopy and Complex impedance spectroscopy to depict the optical, structural, vibrational and electrical properties. Our structural results show that the obtained samples were composed of (Co 3 O 4) polycrystalline with spinel-type preferentially oriented in the (311) plane. Our optical results show that the films have high transparency over the visible region (85% for Co 3 O 4 and ~ 60-75% for all doped samples). The optical band gaps were found to be (E g1 = 1.50 eV, E g2 = 2.20 eV) and (E g1 = 1.42 eV, E g2 = 2.07 eV) for the case of (pure Co 3 O 4 and 9% Ni-doped Co 3 O 4) respectively. The complementary phase information is provided by FT-IR spectroscopy. FT-IR spectra confirms the presence of Co 2+-O and Co 3+-O vibrations in the spinel lattice. The Nyquist plots suggests that the equivalent circuit of our films is an parallel circuit R p C p. It was found that the resistance Rp decreases whereas the capacity Cp increases with increasing doping levels.

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“…The CoFe 2 O 4 NPs have been synthesized by various methods including coprecipitation, microemulsion, mechanical alloying, hydrothermal, and sol‐gel autocombustion . Among these methods, sol‐gel method offers a flexible approach to obtaining a diverse range of materials without use of expensive processing technologies, such as vacuum methods .…”

Section: Introductionmentioning

confidence: 99%

“…8,11 The CoFe 2 O 4 NPs have been synthesized by various methods including coprecipitation, [12][13][14][15][16] microemulsion, [17][18][19][20] mechanical alloying, [21][22][23] hydrothermal, [24][25][26][27][28][29][30] and sol-gel autocombustion. [31][32][33][34][35] Among these methods, sol-gel method offers a flexible approach to obtaining a diverse range of materials without use of expensive processing technologies, such as vacuum methods. 36 Furthermore, the diversity of materials which can be obtained, high purity crystalline products, the chemical homogeneity of synthesized powders, and need to inexpensive precursors has made the solgel method as an important synthesis route in several domains of research, including optics, electronics, semi-/ superconductors, and biomaterials.…”

Section: Introductionmentioning

confidence: 99%

The effect of agarose content on the morphology, phase evolution, and magnetic properties of CoFe₂O₄ nanoparticles prepared by sol‐gel autocombustion method

Rouhani

Esmaeil‐Khanian

Davar

et al. 2017

Int J Applied Ceramic Tech

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Hard‐magnetic CoFe2O4 nanoparticles were produced with the sol‐gel autocombustion route using agarose and citric acid as a neutral organic gel and combustion agent. For this purpose, the obtained gel is annealed at 800°C for 3 hours and then the spinel structure of the samples was confirmed by X‐ray diffraction (XRD). In addition, the existence of metal‐oxygen complexes in the gel and nanoparticles was investigated by Fourier transformation infrared (FTIR) spectra. Furthermore, FESEM images showed that semispherical and rod‐like particles were obtained by variation in agarose contents. For the rod‐like sample with 2.5 g agarose, the saturation magnetization and coercivity were measured equal to 71.7 emu/g and 10076.84 Oe, respectively.

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Synthesis of cobalt ferrite with enhanced magnetostriction properties by the sol−gel−hydrothermal route using spent Li-ion battery

Cited by 70 publications

References 46 publications

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Structural, optical and electrical properties of Ni-doped Co3O4 prepared via Sol-Gel technique

The effect of agarose content on the morphology, phase evolution, and magnetic properties of CoFe₂O₄ nanoparticles prepared by sol‐gel autocombustion method

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Synthesis of cobalt ferrite with enhanced magnetostriction properties by the sol−gel−hydrothermal route using spent Li-ion battery

Cited by 70 publications

References 46 publications

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Structural, optical and electrical properties of Ni-doped Co3O4 prepared via Sol-Gel technique

The effect of agarose content on the morphology, phase evolution, and magnetic properties of CoFe2O4 nanoparticles prepared by sol‐gel autocombustion method

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The effect of agarose content on the morphology, phase evolution, and magnetic properties of CoFe₂O₄ nanoparticles prepared by sol‐gel autocombustion method