Synthesis, structural characterization, and magnetic properties of Ni–Zn nanoferrites substituted with different metal ions (Mn2+, Co2+, and Cu2+)

Abu-Elsaad, N.I.; Nawara, A.S.; Mazen, S. A.

doi:10.1016/j.jpcs.2020.109620

Cited by 47 publications

(41 citation statements)

References 34 publications

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“…The decreasing trend in density with increasing Mn contents can be attributed to the increase in nanoparticle lattice parameters. Similar results have been reported previous [35,36] . The results fitted well with the data obtained from the Mn x Zn 1‐ x Fe 2 O 4 nanoparticles prepared by co‐precipitation [37] …”

Section: Resultssupporting

confidence: 90%

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Composition Dependent Structural and Magnetic Properties of Mn−Zn Ferrite

Ding

2020

ChemistrySelect

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To reveal the intrinsic mechanism of MnxZn1‐xFe2O4 (x=0.2, 0.4, 0.6, 0.8 and 1) nanoferrite with various content of Mn/Zn are prepared by hydrothermal method. The physical properties are characterized by X‐ray diffraction (XRD), Fourier transformed infrared spectrometer (FTIR), Transmission electronic microscope (TEM), Energy Dispersion Spectrum (EDS) and Vibrating Sample Magnetometer (VSM). The phase structure, lattice parameters, and magnetic properties have been investigated based on the entire cation distribution with enhancement of the Mn2+. The XRD and FTIR analysis indicate that the samples have cubic spinel ferrite structure, the lattice constant at and crystallite size D increase with enhancement of Mn content. The VSM plots demonstrate that the Mn0.6Zn0.4Fe2O4 sample has the largest saturation magnetization value (77 emu/g). These results indicate that a fine tuning of Mn2+ content can adjust the micro‐structure and magnetic properties of MnxZn1‐xFe2O4.

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Section: Resultssupporting

confidence: 90%

“…Similar results have been reported previous. [35,36] The results fitted well with the data obtained from the Mn x Zn 1-x Fe 2 O 4 nanoparticles prepared by coprecipitation. [37] The variation of Mn concentration in MnÀ Zn nanoferrites may lead to the redistribution of 16 B sites and 8 A sites in spinel ferrites.…”

Section: Xrd Analysissupporting

confidence: 74%

Composition Dependent Structural and Magnetic Properties of Mn−Zn Ferrite

Ding

2020

ChemistrySelect

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“…The magnetic, electrical, catalytic, and optical properties of ferrite depend on the distribution of divalent and trivalent ions at A and B sites [11]. In addition, these properties also vary with the geometry and size of nanoparticles [12]. The quality of ferrite can be improved by adding nonmagnetic/diamagnetic ions with the same appropriate valence state at points A and point B. Lanthanide (Ce -Y) as a dopant in ferrite is particularly noteworthy [13].…”

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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“…Most of the Me 2+ ions occupy the octahedral position, while Zn 2+ ions tend to stabilize in the tetrahedral position. When x = 0, it is inverse spinel structure, in which Fe 3+ accounts for half in A and B, such as Fe 3 O 4 and NiFe 2 O 4 ; when x = 1, it is orthospinel structure, such as ZnFe 2 O 4 ; when 0 < x < 1, the spinel structure is mixed, such as MnFe 2 O 4 and MgFe 2 O 4 [12]. The quality of ferrite can be improved by adding nonmagnetic/diamagnetic ions with the same appropriate valence state at points A and point B. Lanthanide (Ce -Y) as a dopant in ferrite is particularly noteworthy [13].…”

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

Preprint

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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 confirmed 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 coefficient 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 coefficient can be used to prepare temperature-sensitive ferrofluid. All the samples exhibit very small coercivity and almost zero remanences, which indicates the superparamagnetism of the synthesized nanoparticles.

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Synthesis, structural characterization, and magnetic properties of Ni–Zn nanoferrites substituted with different metal ions (Mn2+, Co2+, and Cu2+)

Cited by 47 publications

References 34 publications

Composition Dependent Structural and Magnetic Properties of Mn−Zn Ferrite

Composition Dependent Structural and Magnetic Properties of Mn−Zn Ferrite

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

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