IR Spectra, Elastic and Dielectric Properties of Li–Mn Ferrite

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

doi:10.5402/2012/907257

Cited by 30 publications

(11 citation statements)

References 32 publications

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“…We can fully understand the change of the sound velocity by studying its thermodynamical coordinates, since the response of the solid to the acoustic pulse depends on its interatomic arrangement, in a spinel structure, and there are two main interstitial sites, the octahedral (B) and tetrahedral site (A). The vibrating force constant then depends on the ion distribution in the crystal lattice; with the help of Waldron's method (Mazen & Abu-Elsaad, 2012), the force constant can be calculated using the following equations (Mazen & Abu-Elsaad, 2012):…”

Section: Discussionmentioning

confidence: 99%

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Elastic Properties of Cr-doped Mn Ferrite

Abdellatif

Azab

2019

Bull Natl Res Cent

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Background: The mechanical properties of Mn-Cr ferrite of different compositions are important for industrial applications in everyday life. Ferrites are used in electric choke coils, electric transformers, and many other electronic and optical devices. The elastic properties can be understood by studying the longitudinal sound velocity (V l ) and shear velocity (V s ). Results: The longitudinal sound velocity (V l ) and shear velocity (V s ) are measured at room temperature by pulse transmission technique at the frequency of 1659 Hz, which is ideally representing the mechanical properties of the ferrite crystal. The shear sound velocity was found to be around 4 × 10 3 m∕s while the longitudinal sound velocity was ranging according to the doping concentration from 6 × 10 3 to 1 × 10 4 m∕s. The behavior of Young's modulus (E), rigidity modulus (n), mean sound velocity (V m ), and Debye temperature (θ D ) is quite similar, where a change in the slope was noticed at Cr concentration higher than 0.7 in the spinel lattice. Conclusion: We have characterized the elastic properties of the spinel structure Mn-Cr ferrite with different Cr ion concentration at a fixed sound frequency using the pulse transmission technique. The longitudinal sound velocity showed an increase with increasing Cr ion concentration, the rigidity constant as well as Debye temperature, Isotropic compressibility, and the acoustic impedance showed behavioral change at Cr ion concentration x = 0.7 which is correlated to the intra-ionic distances change due to the replacement of Fe ions with smaller size Cr ions.

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Section: Discussionmentioning

confidence: 99%

“…where ν 1 and ν 2 are determined from the IR spectra, then M a and M b are the molecular weights of cations in sites A and B, respectively, according to the cation distribution predicted from X-ray. Moreover, the Debye temperature θ d can be calculated using the following formula (Mazen & Abu-Elsaad, 2012):…”

Section: Discussionmentioning

confidence: 99%

Elastic Properties of Cr-doped Mn Ferrite

Abdellatif

Azab

2019

Bull Natl Res Cent

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“…The higher values of νA than those of νB indicating that the normal vibration of M-O at A sites is higher than that at B sites. This may be retained to the shorter bond length of metal -oxygen in A site than that in B site [41]. The position of νA and νB vary slightly with the variation of the metal-oxygen (M -O) distances at A and B sites.…”

Section: Morphological Analysis Of Cozn Ferrite Nano-particlesmentioning

confidence: 97%

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

Kershi

Aldirham

2020

Preprint

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Magnetic Co ferrite nanoparticles doped with non-magnetic ions (Zn2+) fabricated by modified inverse coprecipitation technique. X-ray calculations show that the average crystallite size (D) and the average lattice constant (a) of CoZn ferrite nanoparticles increase from 32.33 to 52.87 nm and from 8.39 to 8.41Ǻ respectively with increasing non-magnetic Zn2+ ions from 0.00 to 0.55. Morphological forms and M-O at A and B sites studied by SEM and FT-IR spectroscopy. Measurements of the structural, optical, electrical and magnetic characterization of the CoZn ferrite nanoparticles strongly depend on non-magnetic Zn2+ ions content (y). Non-magnetic ions transform Co ferrite from hard and dielectric nature to soft and semiconductor nature. Values of Coercivity and the remanence decrease as non-magnetic Zn2+ ions increases to the minimum values 955 Oe and 6 emu /g for the sample with Zn = 0.55. Co0.45Zn0.55Fe2O4 is might be suitable for high-frequency applications where it has the smallest value of optical gap, the largest value of resistivity and the lowest value of dielectric loss factor.

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“…The temperature dependance of electrical conductivity of prepared nano ferrites studied by plotting a graph between the Log (σT) vs 1000/T. By plotting the graph, we get a curve whose slope can be used to calculate the thermal activation energy of nano ferrite samples [22] 3.5 Thermo electric power studies of Sm doped Mg nano ferrites:…”

Section: Electrical Propertiesmentioning

confidence: 99%

FTIR, Optical, Electrical and Magnetic properties of Sm+3 doped Mg Nano Ferrites by Citrate-Gel Auto combustion method

Venkatesh

Goud

Nama

et al. 2021

Preprint

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Sm, doped Mg nano ferrites with composition Mg Sm x Fe2 − x O4 (where X = 0.000, 0.025, 0.050, 0.075,0.1) were synthesized by citrate-gel auto-combustion method. The Samples were analyzed through various experimental techniques. The structural confirmation was done with the basic characterization techniques such as XRD (X-ray Powder Diffraction) and Fourier Transform Infrared (FTIR) spectroscopic analysis. To study the optical absorption behavior of the prepared ferrites, UV-visible spectral analysis was carried out. XRD analysis established the formation of single-phase cubic spinel structure of the materials. FTIR spectra has shown two absorption peaks that are characteristic of spinel nano ferrites. The dc electrical resistivities of the Sm doped Mg nano ferrites were studied by using two probe method at the temperature range of 200–500 °C. A plot of log (σT) vs inverse of temperature yields a curve which reveals a semiconducting nature of prepared nano ferrites. The Thermo Electric Power (TEP) studies of prepared samples carried out at high temperature (573K). The values of the Seebeck coefficient and curie temperature of Sm doped Mg nano ferrites were observed. The magnetization measurements were carried out by using Vibrating Sample Magnetometer (VSM).

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IR Spectra, Elastic and Dielectric Properties of Li–Mn Ferrite

Cited by 30 publications

References 32 publications

Elastic Properties of Cr-doped Mn Ferrite

Elastic Properties of Cr-doped Mn Ferrite

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

FTIR, Optical, Electrical and Magnetic properties of Sm+3 doped Mg Nano Ferrites by Citrate-Gel Auto combustion method

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