An investigation of structural and magnetic properties of Ce–Nd doped strontium hexaferrite nanoparticles as a microwave absorbent

Khandani, Marzieh; Yousefi, Mohammad; Afghahi, Seyyed Salman Seyyed; Amini, Mostafa M.; Torbati, Maryam Bikhof

doi:10.1016/j.matchemphys.2019.121722

Cited by 47 publications

(7 citation statements)

References 44 publications

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“…ions [20] at positions 12k, 2a, 2b with spin up and 4f1, 4f2 with spin down. Thus, the total magnetic moment depends on the number of spin ups and spins down on the material [17].…”

Section: Vibrating Sample Magnetometer (Vsm)mentioning

confidence: 99%

EFFECT OF NiO AND CoO ADDITIVES ON CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES IN MANUFACTURING MAGNETS BaFe12O19

null

Naibaho²,

Puspita

et al. 2023

Materials

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The synthesis of BaFe12-2xCoxNixO19 (x = 0.5-1.5) at a calcination temperature of 1000°C using the coprecipitation method has been done by varying the concentration of the mixed precursor in order to identify the optimum sample. Barium Hexaferrite powder with 0.5% and 1% Nio-CoO has a BaFe12O19 phase. The DT-TGA curve analysis, at temperatures above 1000 o C with a relatively small decrease in mass of 0.37%, indicates that the unwanted compounds have decomposed and the Barium Hexaferrite phase begins to form. Samples with a composition of 1%, NiO-CoO formed BaFe2O4 and NiBa phases, with a quantity of 96.4% BaFe2O4 phase. The phase change is caused by the lack of oxygen which weakening of the Fe-Sr-O bond. The magnetic properties of Barium Hexaferrite powder were successfully improved at 1% NiO-CoO, with a BHmax value of 2.26 MGOe.

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“…ions [20] at positions 12k, 2a, 2b with spin up and 4f1, 4f2 with spin down. Thus, the total magnetic moment depends on the number of spin ups and spins down on the material [17].…”

Section: Vibrating Sample Magnetometer (Vsm)mentioning

confidence: 99%

EFFECT OF NiO AND CoO ADDITIVES ON CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES IN MANUFACTURING MAGNETS BaFe12O19

null

Naibaho²,

Puspita

et al. 2023

Materials

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“…Hexaferrites (M, W, X, U, Y, Z types) have a signi cant request in daily life during the last decades. Among them, Strontium-based M-type hexaferrite ( MFe 12 O 19 ) is a paramount demand for different industrial, military, and home equipment applications [1][2].In this context, SrFe 12 O 19 emerges exemplary features involving relatively large saturation magnetization, high coercive force, outstanding Curie temperature, pronounced magneto-crystalline anisotropy, excellent chemical and thermal stability, high dielectric constant, low conductive losses, corrosion resistance, non-toxicity, andsimple accessibility [3][4][5][6]. Due to such superior properties, SrFe 12 O 19 is a multidisciplinary technological componentindispensablefor refrigerator magnets, permanent magnets, recording media, automotive industries, microwave devices, sensors, biomedicine, photocatalyst, magneto-optics devices, magnetic uids, sound devices, electric motors, generators, etc.…”

Section: Introductionmentioning

confidence: 99%

Dominating the structural, microstructural, and magnetic features of Li+-substituted strontium hexaferrite (Sr1−xLi2xFe12O19)

Hessien

El-Bagoury

Mahmoud

et al. 2021

J Mater Sci: Mater Electron

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Lithium ion substituted hexagonal strontium ferrite (Sr 1-x Li 2x Fe 12 O 19, where x= 0.1, 0.2, and 0.3) powders have been felicitously fabricated using tartrate precursor scheme. The impact of the Li + content, as well as the annealing temperature on the phase evolution, microstructure and magnetic performance, was commanded by X-ray diffraction pro le (XRD), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). Single phase hexagonal ferrite was consummated at a Li + ratio of 0.2 and different annealing temperatures, from 1000 to 1200 o C for 2h. An impurity α-Fe 2 O 3 phase was noted at a high Li + concentration of 0.4 and 0.6 at all temperatures. The crystallo-aspects characteristics were altered with Li + content and annealing temperature. The microstructure of pure hexagonal ferrite sample visualized platelet like structure. A ne spherical shape displayed with platelet shape by enhancing the Li + content up to 0.4 and 0.6. EDX analysis emphasized Fe, Sr, O, and Li atoms spread between the plate and spherical shapes. Good saturation magnetization (Ms=60.88 emu/g) was realized for Li + content of 0.2 as the results of increasing the thickness of the nanoplatelet structure.

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“…Khandani et al formed a Ce-Nd doped Sr hexagonal ferrite that has given absorption properties in the X-band range. The observed RL was −8.7 dB at 2.5 mm thickness [6]. Singh et al experimented to find the effect of doping on microwave absorption.…”

Section: Introductionmentioning

confidence: 99%

“…Veisi [18]. Later Khandani et al had also done a synthesis of Ce-Nd doped Sr hexaferrite and observed −37 dB RL at 9.62 GHz at 2.5 mm thickness [19]. A comparison is done between the microwave absorption property of Ba hexaferrite with and without doping by Scozeri et al [20] and found maximum RL of −41 dB with Cr 3+ doping and −33 dB RL without doping in X-band.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of suitable material for microwave absorbing properties in X-band

et al. 2020

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Synthesization of M-type hexaferrite with composition Ba 0.5 Sr 0.5 Co x Ga x Fe 12-2x O 19 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) has been performed at temperature 1100 °C for 15 h by adopting conventional ceramic method. For analyzing the structure of synthesized material, the X-ray diffraction (XRD) method has been used. Besides that its properties are observed by using different characterization techniques like VSM (vibrating sample magnetometer), Fourier Transform Infrared (FTIR) spectra and VNA (Vector network analyzer), SEM (scanning Electron Microscopy), Energy-dispersive X-ray spectroscopy (EDAX). Microwave absorption property has been investigated using quarter wavelength and impedance matching mechanism in the X-Band range (8.2-12.4 GHz). From the results obtained, it was being observed that microwave absorption was best at doping concentration x = 0.4 i.e. −33.36 dB reflection loss at thickness 2.0 mm and frequency 9.62 GHz. The synthesized samples can be used for different possible applications in X-Band as narrowband & broadband absorbers and EMI shielding devices. The main applications are Electromagnetic Compatibility, microwave filters, network switches, Radar cross-section reduction (RCS) in the military, electronic enclosures and antenna applications.

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An investigation of structural and magnetic properties of Ce–Nd doped strontium hexaferrite nanoparticles as a microwave absorbent

Cited by 47 publications

References 44 publications

EFFECT OF NiO AND CoO ADDITIVES ON CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES IN MANUFACTURING MAGNETS BaFe<sub>12</sub>O<sub>19</sub>

EFFECT OF NiO AND CoO ADDITIVES ON CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES IN MANUFACTURING MAGNETS BaFe<sub>12</sub>O<sub>19</sub>

Dominating the structural, microstructural, and magnetic features of Li+-substituted strontium hexaferrite (Sr1−xLi2xFe12O19)

Synthesis of suitable material for microwave absorbing properties in X-band

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An investigation of structural and magnetic properties of Ce–Nd doped strontium hexaferrite nanoparticles as a microwave absorbent

Cited by 47 publications

References 44 publications

EFFECT OF NiO AND CoO ADDITIVES ON CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES IN MANUFACTURING MAGNETS BaFe&lt;sub&gt;12&lt;/sub&gt;O&lt;sub&gt;19&lt;/sub&gt;

EFFECT OF NiO AND CoO ADDITIVES ON CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES IN MANUFACTURING MAGNETS BaFe&lt;sub&gt;12&lt;/sub&gt;O&lt;sub&gt;19&lt;/sub&gt;

Dominating the structural, microstructural, and magnetic features of Li+-substituted strontium hexaferrite (Sr1−xLi2xFe12O19)

Synthesis of suitable material for microwave absorbing properties in X-band

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EFFECT OF NiO AND CoO ADDITIVES ON CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES IN MANUFACTURING MAGNETS BaFe<sub>12</sub>O<sub>19</sub>

EFFECT OF NiO AND CoO ADDITIVES ON CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES IN MANUFACTURING MAGNETS BaFe<sub>12</sub>O<sub>19</sub>