In this research work, we report synthesis, structural and other physical properties of Co1 − xCuxFe2O4 [x = 0.00, 0.25, 0.5, 0.75, 1.00] spinel ferrites. These materials were synthesized using double calcination solid-state method. To confirm the crystal structure acquired by the samples, we carried out X-ray diffraction characterization and the diffraction data was Rietveld refined. The crystallization of all the samples into cubic (Fd-3 m) phase was ascertained from refinement and the structural parameters obtained there. We examined these spinel ferrite samples for room temperature magnetic properties and from the analysis of magnetic data (M–H Curve), these samples were found to exhibit super-paramagnetic behaviour. The Mossbauer spectral analysis confirms the super-paramagnetic nature and the six-line magnetic pattern arising from the super-exchange interaction among the magnetic ions at tetrahedral and octahedral sites have been witnessed. In addition, the room-temperature frequency-dependent dielectric properties were investigated and the data analysis revealed that these materials exhibit better dielectric properties where dielectric constant is high and dielectric loss values are relatively low. Impedance data study reveals that the samples under observation exhibit deviation from the ideal Debye behaviour and inherit a distribution of time constants. All the characterizations reported here were performed at room temperature.

In this piece of research, we throw light on the synthesis, structure and other physical properties of Co(1-x)CuxFe(2)O(4) [x = 0.00, 0.25, 0.5, 0.75, 1.00] spinel ferrites. These materials were synthesized by employ-ing the double calcination solid-state method. To confirm structured acquired by the synthesized sam-ples, we characterized our samples by X-ray diffraction technique, FTIR spectroscopy and inelastic Raman scattering technique. XRD studies reveal that all the samples are present in cubic crystal structure (Fd-3m). The desired phase formation was confirmed from Raman and FTIR spectra analysis also. To emphasize on electrical properties, we carried out room temperature frequency dependent ac conductiv-ity measurements also.Copyright (C) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of 2022 International Confer-ence on Recent Advances in Engineering Materials.

In the present study, the impact of Cr ion substitution on Mn–Zn soft nanoferrites has enhanced the dielectric, electrical conductivity, and impedance properties. The nanoferrites have been synthesized via a non-conventional wet chemical-based co-precipitation technique. Raman scattering confirms the spinel nature and also reveals a positive frequency shift with the Cr ion substitution. As Cr ion concentration increases, the dielectric constant (ε′) increases significantly at room temperature. At 100 Hz, x = 0.5 [Mn0.5Cr0.5Fe2O4] resulted in higher value of ε′ ~ 104 and a lower value of loss (tan δ) ~ 3.9. Frequency modulated ac conductivity rises with increasing Cr substitution in Mn–Zn nanoferrites. Electric modulus, impedance spectra, and conduction nature were found to improve with increasing Cr ions. The Nyquist plot shows two semicircle responses in the high and mid-frequency regions, which is due to a conduction mechanism of charges (Fe2+ ↔ Fe3+) that is related to bulk grains and grain boundary contribution, respectively. High dielectric constants and minimum electric loss in soft nanoferrite materials are useful for electronic device applications.

In this report, we discuss the structural and dielectric properties of TM0.7Zn0.3Fe2O4 (TM = Ni, Mn) spinel ferrites. The ferrite materials under study were synthesized by the solid state reaction method. For structural elucidation, these materials were characterized by X-ray diffraction technique and Raman scattering Method. The analysis of XRD data obtained in the angular range of 10 degrees - 80 degrees revealed that both the samples under study have crystallized in cubic structure (Fd3m). The XRD results were verified by Raman spectral study from the display of fingerprint modes of vibration related to cubic structure acquired by these ferrite materials. The dielectric study infers the samples are extremely good dielectric materials with high dielectric constant and comparatively low loss value. The dielectric constant of Zn doped of MnFe2O4 is higher. However, the resonance like behaviour is observed for Zn doped NiFe2O4. The high dielectric constant and relatively low loss value infer their feasibility in advanced electronic device applications. (c) 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Multifunctional Nanomaterials.

A series of Cu-C o ferrite based bulk particles (Cu (1-x) Co(x)Fe2O4) in which x is varied from 0.0 to 0.6 were prepared by Solid State reaction route. The influence of the Co content on the structural properties of cubic Nickel ferrites (CuFe2O4) was investigated using Raman spectroscopy. Slight reduction in the lattice parameter of Co doped CuFe2O4 has been observed as compared to the parent CuFe2O4. From Raman scattering spectra, a shoulder like feature has been observed in both parent and doped com pounds which reveals that octahedral site is occupied by Co, Cu and Fe ions and tetrahedral site is occupied by only Feion.

This paper deals with the electromagnetic field interact in biological tissues. It is actually one of the important challenges for the electromagnetic field for the recent years. The experimental techniques are use in Broad-band Dielectric Measurement (BDM) with LCR meters. The authors used Bones and scales of Fish taken from Narmada River (Rajghat Dist. Barwani) as biological tissues. Experimental work carried out done in inter-university consortium (IUC) Indore. The major difficulties that appear are related to the material properties, to the effect of the electromagnetic problem and to the thermal model of the biological tissues.

Propagation of electromagnetic (EM) waves in radiofrequency (RF) and microwave systems is described mathematically by Maxwell's equations with corresponding boundary conditions. Dielectric properties of lossless and lossy materials influence EM field distribution. For a better understanding of the physical processes associated with various RF and microwave devices, it is necessary to know the dielectric properties of media that interact with EM waves. For telecommunication and radar devices, variations of complex dielectric permittivity (referring to the dielectric property) over a wide frequency range are important. For RF and microwave applicators intended for thermal treatments of different materials at ISM (industrial, scientific, medical) frequencies, one needs to study temperature and moisture content dependencies of the Permittivity of the treated materials. Many techniques have been developed for the measurement of materials. In the present paper authors used Bones and scales of Fish taken from Narmada River (Rajghat Dist. Barwani) as biomaterials. Dielectric properties of Biomaterials with the frequency range from 1Hz to 10 MHz at room temperature with low water content were measured by in-situ performance dielectric kit. Analysis has been done by Alpha high performance impedance analyzer and LCR meters. The experimental work were carried out in Inter University Consortium UGC-DAE, CSR center Indore MP. Measured value indicates the dielectric constant (epsilon') dielectric loss (epsilon '') decreases with increasing frequency while conductivity (sigma) increases with frequency increased.

The change in the wavelength of ultrasonic waves in different medium is due to the elastic properties and the induced particles vibrations in the medium. The study of propagation of ultrasonic wave in liquid systems and solids is now rather well established. Ultrasonic waves are an effective means for examining and analyzing certain physical properties of the materials. It is universally adopted to examine the changes in such physical properties while they occur. In the present study authors are analyzed aqueous solutions of 'Borassus Flabellifier' fruit pulp, which is available in Western part of MP (Dhar-Jhabua Districts) India, at various concentrations have been experimentally determined by using Non Destructive technique (NDT). Some values of acoustical parameters such as intermolecular free length (Lf), Acoustic impedance (Z), and Isentropic compressibility (βs), were computed with the viewpoint importance and applicability in asserting the interactions. These solutions are known for their natural ingredients in pharmaceutical activity as anti-diabetic, pain killing & temperature reducing. In this paper, authors are reported. Ultrasonic wave velocities in a aqueous solution of Borassus Flabellifier fruit pulp at different concentrations using Multi frequency Ultrasonic interferometer Model M-81 S.