The effect of chelating/combustion agent on catalytic activity and magnetic properties of Dy doped Ni–Zn ferrite

Samoilă, Petrişor; Slatineanu, Tamara; Postolache, Petronel; Iordan, Alexandra Raluca; Palamaru, Mircea Nicolae

doi:10.1016/j.matchemphys.2012.06.059

Cited by 53 publications

(17 citation statements)

References 36 publications

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“…According to spinel structure of ferrites, metal ions are distributed between two sub-lattices (tetrahedral and octahedral sites) with oxygen as the nearest neighbor. The higher band (ʋ 1 ) corresponds to intrinsic stretching vibrations of metal (M–O) at tetrahedral lattice sites, whereas the lower band (ʋ 2 ) represents stretching vibrations of metal ions at octahedral lattice sites [27]. In our sample the higher band (ʋ 1 ) appears at 546.18 cm −1 while the lower band (ʋ 2 ) appears at 412.58 cm −1 , as shown in Figure 4.…”

Section: Resultsmentioning

confidence: 67%

Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures

Nairan

Khan

et al. 2016

Nanomaterials

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In this work MnxCo1−xFe2O4 nanoparticles (NPs) were synthesized using a chemical co-precipitation method. Phase purity and structural analyses of synthesized NPs were performed by X-ray diffractometer (XRD). Transmission electron microscopy (TEM) reveals the presence of highly crystalline and narrowly-dispersed NPs with average diameter of 14 nm. The Fourier transform infrared (FTIR) spectrum was measured in the range of 400–4000 cm−1 which confirmed the formation of vibrational frequency bands associated with the entire spinel structure. Temperature-dependent magnetic properties in anti-ferromagnet (AFM) and ferromagnet (FM) structure were investigated with the aid of a physical property measurement system (PPMS). It was observed that magnetic interactions between the AFM (Mn) and FM (CoFe2O4) material arise below the Neel temperature of the dopant. Furthermore, hysteresis response was clearly pronounced for the enhancement in magnetic parameters by varying temperature towards absolute zero. It is shown that magnetic properties have been tuned as a function of temperature and an externally-applied field.

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Section: Resultsmentioning

confidence: 67%

Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures

Nairan

Khan

et al. 2016

Nanomaterials

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“…Until now, several studies have been carried out to make improvements on the microstructure and magnetic properties of rare earth substituted ferrites [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pr3+ substitution on the microstructure, specific surface area, magnetic properties and specific heating rate of Ni0.5Zn0.5Pr Fe2−O4 nanoparticles synthesized via sol–gel method

Yan

Gao

et al. 2015

Journal of Alloys and Compounds

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xia. (2015) Effect of Pr3+ substitution on the microstructure, specific surface area, magnetic properties and specific heating rate of Ni0.5Zn0.5PrxFe2−xO4 nanoparticles synthesized via sol-gel method. Journal of Alloys and Compounds,. Permanent WRAP URL:http://wrap.warwick.ac.uk/94091 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription. Abstract: A series of Ni-Zn ferrite nanoparticles with a nominal composition of Ni0.5Zn0.5Prx Fe2-xO4 (x=0.000 -0.100 with steps of 0.025) has been synthesized by a sol-gel method. The effect of composition and calcination temperature on the morphology, specific surface area, magnetic properties and specific heating rate has been studied. The Ni-Zn-Pr ferrites have a single spinel (NZF) phase at Pr loadings below 5 at%. A minor amount of an orthorhombic PrFeO3 phase is present in the Ni-Zn-Pr ferrites at Pr loadings above 5 at%. At a Pr loading of 10 at%, the specific surface area increases six-fold as compared to that of the non-doped Ni0.5Zn0.5Fe2O4 sample. As the Pr loading increases, the saturation magnetization, remnant magnetization and coercivity increase and reach the maximum at x = 0.05 and then decrease. The maximum values of these parameters are 67.0 emu/g, 9.7 emu/g and 87.2Oe, respectively. Under radiofrequency field (frequency: 295 kHz, intensity: 500 Oe), the highest heating rate of 1.65 K/s was observed over the sample with x = 0.025 which is 2.5 times higher than that of Ni0.5Zn0.5Fe2O4.

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“…properties and electrical properties [6][7][8][9][10][11][12][13][14][15]. One can tailor their physical properties through adjusting ion substitutions.…”

Section: Introductionmentioning

confidence: 99%

“…One can tailor their physical properties through adjusting ion substitutions. For examples, Mallapur [11], Xia [12], Samoila [13], Ateia [14], Peng [15] and Liu [16] studied the Co, Cu, Dy, La, Pr and Mg-La substitution in NZFO prepared through different methods, respectively. As is already known, nanocrystalline NZFO ferrite synthesized via a sol-gel method has attracted considerable attention [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, this method can be easily scaled up to a kg production, which is important for the development of chemical processes involving RF heating. In reference [13], Samoila studied the effect of chelating/combustion agent on catalytic activity and magnetic properties of Dy substituted Ni 0.8 Zn 0.2 Fe 1.98 Dy 0.02 O 4 ferrite prepared by a sol-gel low temperature self-combustion method. In this study, Dy substituted NZFO ferrites with a nominal composition of Ni 0.5 Zn 0.5 Fe 2-x Dy x O 4 nanopowders were prepared by a sol-gel self-combustion method, and the effects of Dy content on their phase composition, morphology, magnetic properties and specific heating rate in the RF range are systematically investigated.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Dy3+ substitution on the structural and magnetic properties of Ni0.5Zn0.5Fe2O4 nanoparticles prepared by a sol-gel self-combustion method

Sun

Yang

et al. 2015

Ceramics International

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The effect of chelating/combustion agent on catalytic activity and magnetic properties of Dy doped Ni–Zn ferrite

Cited by 53 publications

References 36 publications

Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures

Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures

Effect of Pr3+ substitution on the microstructure, specific surface area, magnetic properties and specific heating rate of Ni0.5Zn0.5Pr Fe2−O4 nanoparticles synthesized via sol–gel method

Effects of Dy3+ substitution on the structural and magnetic properties of Ni0.5Zn0.5Fe2O4 nanoparticles prepared by a sol-gel self-combustion method

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