Substitution Effects on Rare-Earth Ions-Doped Nickel-Zinc Ferrite Nanoparticles

Kesavamoorthi, R.; Raja, C. Ramachandra

doi:10.1007/s10948-016-3904-5

Cited by 25 publications

(8 citation statements)

References 25 publications

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“…The distribution of metal cations at A and B sites depends on the sample preparation method, particle size, type, and the number of cations involved. Common synthetic methods include co-precipitation [19], sol-gel [20], citric acid precursor [21], Microemulsion [22] and solid-state chemical reaction method [23]. Among these methods, coprecipitation is one of the methods for preparing ferrite, which can be used in industry at present [24].…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of coprecipitated nickel-zinc ferrite-doped rare earth elements of Sc, Dy, and Gd

Pan

Gao

et al. 2021

J Mater Sci: Mater Electron

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This research is the basic study of temperature-sensitive ferrite characteristics prepared by coprecipitation with doping different typical sizes of rare earth elements. Ni 0.5 Zn 0.5 Re x Fe 2-x O 4 (NZRF) (X = 0.02, 0.05, 0.07 and 0.09) nanoparticles (NPs) doped by Sc, Dy and Gd prepared by chemical coprecipitation method. The structure and properties of Ni 0.5 Zn 0.5 Re x Fe 2-x O 4 were analyzed by various characterization methods. XRD results show that the grain size of Ni 0.5 Zn 0.5 Re x Fe 2-x O 4 is from 10.6 to 12.4 nm, which is close to the average grain size of 13.9 nm observed on TEM images. It is also found that the ferrite particles are spherical and slightly agglomerated in TEM images. FTIR measurements between 400 and 4000 cm -1 have con rmed the intrinsic cation vibration of the spinel structure. The concentrations of nickel, zinc, iron, and rare earth elements have been determined by ICP-AES, and all ions have participated in the reaction. The magnetic properties of Sc, Dy, and Gd 3+ doped NZRF NPs at room temperature are recorded by a physical property measurement system (PPMS-9). It is found that the magnetization can be changed by adding rare-earth ions. When X = 0.07, Gd 3+ doped Ni 0.5 Zn 0.5 Fe 2 O 4 (NZF) exhibits the highest saturation magnetization. The magnetic properties of NZGd 0.07 vary the most with temperature. The thermomagnetic coe cient of NZGd 0.07 nanoparticles stabilized to 0.18 emu/gK at 0-100℃. Hence, NZGd 0.07 with low Curie temperature and the high thermomagnetic coe cient can be used to prepare temperature-sensitive ferro uid. All the samples exhibit very small coercivity and almost zero remanences, which indicates the superparamagnetism of the synthesized nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of coprecipitated nickel-zinc ferrite-doped rare earth elements of Sc, Dy, and Gd

Pan

Gao

et al. 2021

J Mater Sci: Mater Electron

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“…Various optical properties of rare‐earth‐doped samples have been reported by Kesavamoorthi et al [ 27 ] and Hassen Harzali et al which are similar to the results of the present investigation. [ 28 ]…”

Section: Resultsmentioning

confidence: 99%

Influence of Dysprosium Doping on Structural, Magnetic, and Optical Properties of Ni–Zn Ferrites

Ganesh

Sandeep

Chanti

et al. 2023

Physica Status Solidi (a)

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The spinel ferrites with the compositional formula Ni0.8Zn0.2Fe2−xDyxO4 (x = 0, 0.004, 0.008, 0.012, 0.016) have been prepared using the sol–gel method. The X‐ray diffraction measurements confirm the cubic spinel structure of the sample with a space group of Fd‐3m. Morphological analysis of scanning electron microscope images reveals that the particles are spherical in shape. Energy dispersive X‐ray spectroscopy (EDX) confirms the elemental composition. Thermogravimetric analysis (TGA)/differential scanning calorimetry (DSC) analysis of synthesized dysprosium (Dy) doped Ni–Zn ferrites are carried out from 25 to 700 °C. Fourier‐transform infrared (FTIR) spectroscopy studies reveal the stretching and bending vibrations of the various bonds presented in the compounds. The UV–vis absorption spectrum indicates the energy gap values which small decrease with the Dy concentration increase. Raman spectroscopy reveals the crystal distortion and phases of the samples. The room temperature magnetic measurements (M–H loops) are carried out to study the effect of Dy doping on magnetic properties.

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“…The cation distribution among A-and B-sites designates the absorption band positions for ν1 and ν2 vibrations (Ahmad et al, 2018). ν1 around 550 cm -1 indicates the stretching band of the metal-oxygen at the tetrahedral site (Mtetra-O) and ν2 band around 450 cm -1 is due to the metal-oxygen stretching at the octahedral site (Mocta-O) (Kesavamoorthi and Raja, 2017;Slimani et al, 2019). It is clear that the ν1 vibrational band shifts to a higher frequency as the ionic radius of the substituent ion changes (Harzali et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Nadi̇r Toprak Katkisinin Spi̇nel Ferri̇tleri̇n Manyeti̇k Özelli̇kleri̇ne Etki̇si̇

Korkmaz

2020

Mühendislik Bilimleri Ve Tasarım Dergisi

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Nano-size ferrites (NSF) are magnetic nanoparticles (MNPs) which have attracted great interest in the last decades owing to their high surface area-to-volume ratio, high saturation magnetization, initial permeability, etc. Nickel-copper-zinc ferrites are especially used in multi-layer chip inductors (MLCIs) which are found in mobile phones, camcorders, notebook computers, etc. MLCIs are composed of alternating layers of silver electrodes and soft ferrites. Thus, it is important to develop magnetic characteristics in ferrites for requiring less ferrite layers and hence to obtain further miniaturized devices. The goal of our study is to investigate the effect of rare earth substitution of Ni-Cu-Zn ferrite nanoparticles. Ni-Cu-Zn NSFs substituted with rare earth metal (RE) ions Eu 3+ , Tb 3+ , and Dy 3+ in varying concentrations were obtained by a sonochemical method. We investigated the crystal structure, chemical bonding, morphology and magnetic characteristics of the Ni-Cu-Zn NSFs by X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM), respectively. The phase purity of the samples was confirmed by the XRD analysis. Stretching vibrations of spinel ferrites were verified by the FT-IR analysis. VSM results reveal that the rare earth substitution has a significant effect on the magnetic properties of the Ni-Cu-Zn NSFs.

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Substitution Effects on Rare-Earth Ions-Doped Nickel-Zinc Ferrite Nanoparticles

Cited by 25 publications

References 25 publications

Structure and magnetic properties of coprecipitated nickel-zinc ferrite-doped rare earth elements of Sc, Dy, and Gd

Structure and magnetic properties of coprecipitated nickel-zinc ferrite-doped rare earth elements of Sc, Dy, and Gd

Influence of Dysprosium Doping on Structural, Magnetic, and Optical Properties of Ni–Zn Ferrites

Nadi̇r Toprak Katkisinin Spi̇nel Ferri̇tleri̇n Manyeti̇k Özelli̇kleri̇ne Etki̇si̇

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