Structural, magnetic and dielectric properties of Yb3+ doped BaCo-X hexagonal nanoferrites

Khan, Muhammad Azhar; Ullah, Habib; Junaid, Muhammad; Sharif, Muhammad; Alboud, Mohamed F.; Warsi, Muhammad Farooq; Haider, Sajjad

doi:10.1016/j.jallcom.2016.11.369

Cited by 43 publications

(6 citation statements)

References 38 publications

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“…The absorption peaks appear at wave number 3617 cm -1 , 3733 cm -1 indicate the presence of O-H and H-O-H stretching bonding which inform the existence of water molecule within samples. Logically, the water molecules should not be present within samples due to sintering at (950 o C ) temperature, it might be due to moisture content [27]. The FTIR results show the preparation of single phase beta ferrite which moreover best consistent with XRD results.…”

Section: • Electrical Polarizationsupporting

confidence: 69%

Unraveling the structural, electrical Polarization, FTIR, Thermal and electrochemical properties of Dy 3+ substituted ?-ferrites

Ahmad¹,

Aziz²,

Sadiq³

et al. 2022

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This research article reveals the effect of Dy +3 substitution on ?-ferrites KFe 11-x Dy x O 17 with composition (x=0.00, 0.25, 0.50, 0.75 and 1.0). The samples were synthesized by sol-gel auto- combustion method, sintered at 950 o C temperature. The XRD patterns confirmed the single phase of the synthesized samples. The crystallite size varied in the range of 21.49 nm to 25.24 nm for all samples. The polarization verses electric field (P-E) loops indicated the loosy behavior in all samples. The lossy behavior of the samples was seemed to be increased up to x=0.5 and then decreased. The theoretical expression was used to fit an upper branch of P-E loops. FT-IR spectra showed absorption bands at different wavenumbers due to M-O-M stretching vibrations, H-O-H stretching, and C-O-C stretching vibrations, which also confirmed the formation of the single-phase in the samples. Electrochemical measurements of synthesized nano ferrites were carried out by using cyclic voltammetry in a 3.0 M KOH solution. Electrochemical impedance spectroscopy (EIS) has been described by Nyquist plots.

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Section: • Electrical Polarizationsupporting

confidence: 69%

Unraveling the structural, electrical Polarization, FTIR, Thermal and electrochemical properties of Dy 3+ substituted ?-ferrites

Ahmad¹,

Aziz²,

Sadiq³

et al. 2022

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“…4. According to the results of cited literature, the observed bands could be attributed to the stretching vibration of -OH at 3406, 3423 and 3437 cm − 1 (Łojewska et al 2005(Łojewska et al , Kumar et al 2013 , the band at 2764, 2852, 2854, 2913, 2924, 2925 cm − 1 related with the -CH 2 stretching vibration (You et al 2021) , the band at 2396, 2427 cm − 1 were attributed to the oxygen-hydrogen tensile vibrations through hydrogen bond reaction (Khan et al 2017) , 2093 cm − 1 was attributed to the stretching vibration of -C ≡ C-. 1736, 1763, 1790 cm − 1 bands were attributed to carboxyl or aldehyde groups (Kaur and Mehta 2017, Fang et al 2018, You et al 2021 .…”

Section: Xrd Ftir and Xps Analysismentioning

confidence: 78%

CuFeNi LDHs/magnetic biochar composite as peroxymonosulfate activator for removal of enrofloxacin

Gan,

You,

Liu

et al. 2023

Preprint

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In this study, cost-effective peroxymonosulfate (PMS) was used as an oxidant, and a Cu-Fe-Ni layered hydroxides/magnetic biochar composite (MBC/CuFeNi LDHs, MC-1 for short) was used as a catalyst to remove enrofloxacin (ENR), a high toxic pollutant identified in water. The layered structure and surface functional groups of the composite contributed to the degradation of ENR. More specific, 91.6% of ENR was degraded by MC-1&PMS system within 20 minutes. The superior performance of MC-1 was confirmed by characterization analysis and catalytic experiments. The catalytic system not only possessed good recycling performance, but also had excellent magnetic properties. In addition, the catalytic mechanism of the MC-1&PMS system was attributed primarily to the generation of hydroxyl (∙OH), but also the sulfate (SO4∙−), singlet oxygen (1O2) and superoxide radicals (∙O2−). Furthermore, a possible degradation pathway of ENR was proposed. This study provided a new insight for the design of heterogeneous carbon catalysts in advanced oxidation field.

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“…In comparison with X‐ray density, it was observed that the bulk density values are slightly lower which corresponds the presence of the pores in the prepared material. [ 17 ] Also, the bulk density is varied due to the variations in the values of mass, radius and thickens of the pellets. The porosity of the prepared samples was evaluated by using the bulk and X‐ray density and the listed values shows the decreasing trend with the increase in substitution elements.…”

Section: Resultsmentioning

confidence: 99%

Revelation of the Microwave Absorption Properties of Nano‐Sized Doubly Substituted Hexagonal Ferrites

Idrees,

Sadiq,

Khan

et al. 2024

Cryst. Res. Technol.

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The main theme of this work is to synthesize and investigate different properties of Pr3+‐Cu2+ substituted X‐type hexaferrite Sr2‐xPrxCo2Fe28‐yCuyO46 with concentration (x = 0, 0.02, 0.06, 0.1 and y = 0, 0.1, 0.3, 0.5) by adopting the sol–gel method. The XRD patterns show the single phase for all the samples. The Pr3+‐Cu2+ substitution in pure X‐type hexaferrites changes the structural parameters. The increment in dielectric properties with Pr3+‐Cu2+ substitution is observed and the patterns show anomalous dielectric behavior. The FTIR analysis also confirms the single phase for the prepared materials. The magnetic properties of the material are enhanced with additives. The difference in saturation magnetization, coercivity, and remanence is observed on the basis of allocated cations onto the different lattice sites. The linear increase in saturation magnetization, remanence, and coercivity make them useful as permanent magnets. The thermal analysis is carried out to know the sintering temperature at which the single X‐type phase can be attained. The material exhibits the minimum value of reflection loss (microwave absorption) at higher frequencies that make this material useful to act as microwave absorbing material (MAM) for super high frequency (SHF) devices.

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Structural, magnetic and dielectric properties of Yb3+ doped BaCo-X hexagonal nanoferrites

Cited by 43 publications

References 38 publications

Unraveling the structural, electrical Polarization, FTIR, Thermal and electrochemical properties of Dy 3+ substituted ?-ferrites

Unraveling the structural, electrical Polarization, FTIR, Thermal and electrochemical properties of Dy 3+ substituted ?-ferrites

CuFeNi LDHs/magnetic biochar composite as peroxymonosulfate activator for removal of enrofloxacin

Revelation of the Microwave Absorption Properties of Nano‐Sized Doubly Substituted Hexagonal Ferrites

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