Mg-Zn Ferrites Research Articles

Effect of zinc substitution on structural, electrical, dielectric and magnetic properties of magnesium nano-ferrites prepared by co-precipitation route

Zinc substituted Magnesium ferrites synthesized by using Co-precipitation method. The structural characterisations of samples are carried out and formation of single-phase nickel ferrite was substantiated through powder X-ray diffraction. The lattice parameters were calculated that are in the range 8.323–8.361 Å.Surface morphology of samples were also investigated through Scanning electron microscopic (SEM) analysis. SEM images revealed clear grain structures of synthesised samples. Magnetic measurements showed the ferromagnetic behaviour, analysed through vibrating sample magnetometer (VSM) while magnetic parameters obtained using VSM measurementat room temperature. MS and HC were found to decrease with increases in the Zn concentration due to non-magnetic behaviour of zinc. The dielectric dispersion for the Mg–Zn ferrites were determined as a function of frequency (50 Hz to 5 MHz). The dielectric constant and the loss tangent decrease expeditiously with incrementing frequency, and then reaches a constant value. The semiconducting behaviour of Mg-Zn ferrites proved by measuring resistivity as a function of temperature and materials are showing thermistor relatively good thermistor constants, they can be utilized as thermistors. The results were discussed in detail in this research article.

Er3+ ion-doped Mg-Zn nanoferrite: Properties and applications in dielectric, magnetic, structural, and optical domains affected by calcination temperature

A series of Mg-Zn ferrites with Er3+ion doping in the shape of cubic spinel were produced using the citrate sol–gel auto-combustion process known as Mg0.5Zn0.5Er0.1Fe1.9O4 (MZE) (calculated at 400, 550, 700, 850, and 1000 °C), and the same was confirmed with the XRD diffractograms. It was possible to understand the presence of hydrated water, which degrades behavior. Hence, the powders created were sintered at various temperatures for four hours. After that, it was observed that the cubic spinel phase was free of impurities. The as-prepared spinel Mg-Zn ferrite nanoparticles also showed a specified behaviour, according to the results. The SEM, UV–Vis spectroscopy, FT-IR (Fourier transform infrared) spectroscopy, TG-DTA (thermogravimetric and differential thermal analysis), XRD (X-ray diffractometer), LCR metre, and VSM (vibrating sample magnetometer) were the characterization techniques used to examine the samples' structural, optical, dielectric, and magnetic properties. A microstructure investigation was done using FESEM analysis. Based on these FESEM measurements, the nanoparticles' sphere-shaped structure was confirmed. FT-IR spectroscopy has been employed to examine the chemical bonds in the spinel ferrite. There is evidence of a shift in bands ν1 and ν2. The produced materials' semiconducting qualities are demonstrated by the optical band gap energy, which is in the range of 1.648–1.798 eV. Variation of dielectric parameters with Er doping was measured in the frequency range from 100 Hz to 1 MHz at room temperature (RT) and at temperatures of 100–400 °C. These results were very well supported by Maxwell-Wagner interfacial polarization. The dielectric properties were observed to decrease with an increase in frequency due to calcinated MZE samples. The magnetic properties of ferrite nanoparticles were investigated in detail at 300 K and 5 K. Early signs of superparamagnetic behaviour have been observed in the prepared sample. It is used in industries like nanoelectronic devices, detectors, imaging devices, super-paramagnetic coils, and magnets.

Barium-doped Mg-Zn ferrites: synthesis, characterization, and microwave absorption properties for radar absorption applications

Barium-doped Mg-Zn ferrites: synthesis, characterization, and microwave absorption properties for radar absorption applications

Effect of Gd3+ ion doping on structural, optical, magnetic and dielectric properties on superparamagnetic Mg0.5Zn0.5Fe2−xGdxO4 (0 ≤ x ≤ 1) nanoparticles synthesized via oleic acid assisted chemical co-precipitation method

In the present study, different compositions having general formula Mg0.5Zn0.5GdxFe2−xO4, (x = 0, 0.025, 0.050, 0.075, 0.1) were synthesized using chemical co-precipitation method. The substitution of Gd3+ ions have exhibited profound impacts on the structural, morphological, magnetic, and optical parameters of Mg-Zn ferrites. Single-phase cubic spinel structure has been substantiated by X-ray diffractometer (X-ray diffraction, XRD) analysis for all compositions without any contamination peak. The values of the lattice constant and X-ray density both show an increasing trend when the Gd3+ ion concentration increases. (Fourier transformed infrared spectroscopy) FTIR spectra recorded in the mid-infrared region (4000–400 cm−1) exhibit two main absorption bands associated with the Oh and Td sites within the frequency range of 400–600 cm−1. Morphological studies using (High-resolution transmission electron microscopy) HR-TEM analysis reveal agglomeration of nanoparticles and the average particle size lies between 8 and 9 nm. Maximum magnetization displays an erratic trend with increasing Gd3+ ion concentration, although both retentivity and coercivity decreases. The hysteresis curve for samples of differing ratios of Gd3+ ions demonstrated the superparamagnetic nature. Tauc’s plot was employed to calculate the energy bandgap (Eg) of synthesized nanoparticles and Eg value were observed to decline from 3.563 eV to 3.521 eV with an increasing Gd3+ ion concentration. Impedance analyzer was used in the frequency range of 100 Hz–100 MHz to study dielectric properties at room temperature. The dielectric parameters declined as the frequency values increased. Due to lower values of dielectric parameters in Gd3+ ion doped Mg–Zn nano-ferrite, these materials are suitable in the fabrication of devices that need to operate at high frequencies such as switching memory storage devices. Moreover, these materials are appropriate for application in ferrofluids and medicinal treatments such as magnetic hyperthermia because of their low coercive field value.

Influence of magnetic external field and particle size on the formation of a single domain state

Magnetic particles are widely employed in applications ranging from medical to industrial. Their magnetic state, a single-domain versus a multi-domain configuration, depends on their size as well as the strength and frequency of an applied magnetic field. The critical size of a single-domain ferromagnetic/ferrimagnetic particle can be determined by minimizing the total free energy, which should include the Zeeman energy term when an external field is applied. To study the effect of an applied field on the critical size of single-domain particles as a function of their size, we performed numerical simulations using MuMax3 software for Fe, Co, Fe3O4, MgZn ferrites, and BaFe12O19. These materials exhibit a wide range of values for magnetic properties such as saturation magnetization and anisotropy. We determined the critical field at which a given sized particle becomes a single-domain magnetic particle. Our MuMax3 calculations for an iron spherical particle were compared with Kondorskii’s analytical theory.

Physio-chemical characterizations and antimicrobial properties of nano-sized Mg-Zn ferrite particles for biomedical applications

ABSTRACT The nano-sized magnesium doped zinc ferrite (MgxZn1-xFe2O4 for x = 0.2 and 0.6) has been synthesised for biomedical application through two different routes (sol–gel and hydrothermal). The x-ray diffraction pattern showed the single phase of ferrite. The crystallite sizes and lattice parameters of Mg-Zn ferrite were obtained by three different methods viz. Scherrer formula (X’pert high score), Maud analysis (Rietveld refinement software), and Williamson Hall Plot. The field emission scanning electron microscopy revealed the near-spherical and dumbbell-shaped morphology of Mg-Zn ferrite. The vibrating sample magnetometer showed the increasing magnetic properties on increasing Mg doping. The elemental dispersive spectroscopy analysis revealed the presence of desired elements. The antimicrobial assay against E. coli (gram-negative) and S. aureus (gram-positive) bacteria showed a clear zone of inhibition. The Mg-Zn ferrite showed good magnetic and antimicrobial properties synthesised via the sol–gel route, which can be further used for possible drug delivery applications.

The Influence of Li+ and K+ Added Cations and Annealing Temperature on the Magnetic and Dielectric Properties of Mg-Zn Ferrite.

This paper presents the results of an investigation on the magnetic and dielectric properties of Mg0.5Zn0.5Fe2O4 spinel ferrite with a 1% weight percentage of Li+ and K+ added cations. The addition of metal ions plays an important role in increasing the porosity and favors the formation of ferrite at low temperatures. The goal of this new research is to demonstrate that by selecting the type of metallic cations for addition or choosing an optimal sintering temperature, it may be possible to improve the magnetic and electrical properties of Mg-Zn ferrite. The samples were prepared using sol-gel self-combustion techniques and annealed at 1000 °C, 1100 °C, and 1200 °C. Scanning electron microscopy revealed the shape and grain size of the samples, and the phase composition was analyzed using the X-ray diffraction technique. The magnetic information, such as remanent magnetization MR, saturation magnetization MS, and coercivity HC, were extracted from the hysteresis loops of the samples. The electrical investigation was focused on the low- and high-frequency dependence of dielectric constant and dielectric losses. The results are discussed in terms of microstructural changes induced by the additions of Li+ and K+ metallic cations. Conclusions are drawn concerning the optimization of magnetic and electrical properties for the development of Mg-Zn ferrite with possible applications in the field of magnetic materials or electronics.

Effect of Cu2+ substitution on structure, morphology, and magnetic properties of Mg-Zn spinel ferrite

Objective: To prepare Cu doped Mg0:5􀀀xCuxZn0:5Fe2O4 (x = 0.0, 0.05, 0.1, 0.15,0.2 and 0.25) spinel ferrites materials and study the structure, morphology, and magnetic properties. Methods: Cu doped Mg-Zn spinel ferrites are magnetic and highly resistive materials. They were synthesized by the method of solid-state reaction and characterized by x-ray diffraction (XRD), field effect scanning electron microscopy (FESEM), Fourier transform infrared (FTIR), andvibrating sample magnetometer (VSM) for their structural, compositional,morphological, functional properties. They are with spinel structure under Fd-3m space group. Their crystallite size was 44.58 nm to 31.02 nm range after calcined at 1000 oC. Their spinel structure was confirmed with FT-IR analysis, whose absorption bands were 598.84 – 580.40 cm-1 and 405.35 - 402.15 cm-1 range for higher and lower frequency, respectively. The value of coercivity is in the range 146.33 - 9.427 Oe with the variation of content. The lower values of the coercivity indicated the soft ferrimagnetic nature of the synthesized materials. Findings/ Application: Substitution of non-magnetic Cu2+ ions strongly influenced the structural and magnetic properties of magnesium ferrites. Keywords: Cu doped MgZn ferrite; XRD; FTIR; FESEM; Coercivity

Detailed analysis of structural and optical properties of spinel cobalt doped magnesium zinc ferrites under different substitutions

Spinel ferrites nanoparticles have complex considerable interest in several technical applications because of their different magnetic behavior. These magnetic nanoparticles obtain finite size and surface effects. The Co doped Mg-Zn ferrites were prepared by co-precipitation method. The structural characterization of the samples was done for Mg0.5Zn0.5-xCoxFe2O4 (X = 0.01–0.05) nano ferrites using X-ray diffraction (XRD), scanning electron microscopy (SEM), UV spectroscopy and Fourier transform infrared spectroscopy (FTIR). The cubical spinel structure of single phase has been obtained. As the concentration of Cobalt in the magnesium zinc ferrite increases, the crystallinity of the cubic spinel phase gradually increases. As increasing the concentration of Co+2 the lattice constant disorderly the lattice symmetry. Absorption spectra display a change in position of maximum absorption near the higher wavelength with increased Co2+ content. Some XRD parameters, using proposed X-ray morphology index, average crystalline size, lattice parameter, Density, Volume of unit cell, etc., have been evaluated. The absorption spectra reveal that in visible region Co-doped Mg-Zn ferrite close infrared region has low absorption rate moreover; in UV region the absorption is high. The evaluation of bandgap of Co-doped MgZnFe2O4 is the important features of its optical characteristics. The SEM image shows the non-uniform grains distributions for all compositions. The IR spectroscopy is a versatile tool for the identification of purity, functional groups, and phase of samples.

Adsorption of Sr(II) ions and salicylic acid onto magnetic magnesium-zinc ferrites: isotherms and kinetic studies.

Magnetic magnesium-zinc spinel ferrite Mg1 - xZnxFe2O4 (where x = 0.4, 0.6, and 0.8) was investigated as adsorbent for the efficient removal of Sr(II) ions and salicylic acid (SA) contaminants from aqueous medium. The characterization of ferrites was carried out using XRD, VSM, BET, SEM, and EDS. The surface charge of magnetic adsorbents was measured by the drift method. The determination of SA and Sr(II) ion concentrations in the solution phase was carried out by UFLC and complexometry, respectively. It was shown that varying of the Zn(II) content affected the adsorption capacities of magnesium-zinc ferrites. The increasing of zinc content from x(Zn2+) = 0.4 to x(Zn2+) = 0.6 increased the adsorption of Sr(II) ions from 50 to 65mg/g, and then it was decreased to 36mg/g for the sample with x(Zn) = 0.8. The Mg0.4Zn0.6Fe2O4 sample demonstrated the maximum adsorption capacity of 74mg/g. The adsorption isotherm for Sr(II) was fitted by the Dubinin-Radushkevich, Langmuir, Freundlich, and Sips models. The adsorption kinetics of Sr(II) was analyzed by PFO, PSO, and Elovich models. The adsorption kinetics of SA was also investigated. It was demonstrated that the Mg0.2Zn0.8Fe2O4 sample exhibited 90% removal of salicylic acid from the water solutions. The results demonstrated that magnetic Mg-Zn ferrites with spinel structure are good sorbents for the removal of SA and Sr(II) ions from aqueous solution.

Enhanced structure and microwave magnetic properties of MgZn ferrite by Cd2+ ion substitution for LTCC applications

Due to its excellent magnetic properties, MgZn ferrite is a nearly optimal material for low temperature co-fired ceramic (LTCC) phase shifter applications. In this study, low temperature co-fired Mg0.8Zn0.2-xCdxFe2O4 ferrites (x = 0.00–0.10, with increments of 0.02) were synthesized using a solid-state method with the aid of 2.5 wt% BBSZ (33%mol Bi2O3-21%mol B2O3-11%mol ZnO-35%mol SiO2) glass sintering. The effects of the Cd2+ ions on phase formation, microstructure, magnetic permeability, and gyromagnetic properties were investigated. The results indicated that a suitable amount of Cd2+ ion substitution did not change the phase formation of MgZn ferrite. However, with further increases of the Cd2+ ion content, the superfluous Cd2+ ions and Fe3+ ions formed CdFe2O4, which affected the microstructure, density and magnetic properties of the samples. More specifically, when x = 0.04, Mg0.8Zn0.16Cd0.04Fe2O4 ferrite, sintered at 920 °C, showed excellent magnetic permeability (μ'~56.6 @1 MHz–20 MHz) and had a high cut-off frequency (~100 MHz). Furthermore, the ferromagnetic resonance line widths (ΔH) were measured as a function of the Cd2+ substitution at 9.56 GHz, and the relationships between ion occupancy and microstructure were also discussed. A narrow ΔH (~228.2 Oe) can be obtained by adding an optimal amount of Cd2+ ions. These observations indicate that MgZn ferrites with a suitable amount of Cd2+ ions are promising candidate materials for LTCC electronic device applications.

Structural, magnetic and toxicity studies of ferrite particles employed as contrast agents for magnetic resonance imaging thermometry

We carried out comprehensive structural, magnetic and toxicity studies of Mg1−xZnxFe2O4 and Cu1−xZnxFe2O4 ferrites that we plan to use as contrast agents for magnetic resonance-imaging thermometry. Samples were prepared by a standard ceramic technique. Their structural properties were investigated with an x-ray diffraction system, and data was analyzed using the Rietveld method that allowed us to determine cations distribution. Magnetic properties of MgZn and CuZn ferrites were studied using a superconducting quantum interference device magnetometer, a vibrating sample magnetometer, and Mössbauer spectrometer. Magnetometry measurements were cross-correlated with XRD results and compared with magnetic properties determined by Mössbauer spectroscopy, allowing us to understand the magnetic structure of studied ferrites. The temperature dependent magnetic measurements were used as guidance to select the most suitable MgZn and CuZn ferrites compositions for MRI thermometry near human body temperature. The inflammation studies indicated that MgZn ferrites are more suitable from the toxicology point of view for MRI thermometry.

Impact of Co doping on physical, structural, microstructural and magnetic features of MgZn nanoferrites for high frequency applications

Cobalt (Co) doped MgZn spinel nanoferrites with composition Mg0.5Zn0.5Cox Fe2-xO4 at x = 0.0, 0.10, 0.20, 0.30, 0.40, 0.50 were prepared using sol-gel auto ignition method. The characterizations techniques such as FESEM, FTIR, XRD and VSM were used to determine the morphology, force constants, phase, structure and magnetic features of the samples. Lattice parameters, FWHM, d-spacing, crystallite size, micro strains and volume were investigated using high score plus software. Materials analysis using diffraction (MAUD) software was also used to study the Rietveld refinement properties of the Co doped MgZn ferrites. Physical properties such as porosity, X-ray and bulk density were also determined. Force constants of their respective absorption bands were calculated from FTIR of the Co doped MgZn nanoferrites. Single phase structure with cubic phase were observed for MgZn and Co doped MgZn at x = 0.0 whereas second phase was observed at higher Co concentrations respectively. FESEM show regular shape of the particles at low Co concentrations whereas agglomerations were observed at higher Co concentrations respectively. The magnetic properties of the Co doped MgZn ferrites were also investigated from VSM study. Magnetic remanence, coercivity, initial permeability, saturation magnetization, Bohr magneton and anisotropy constant were determined from VSM analysis. The coercivity, saturation magnetization, remanence, anisotropy constant and initial permeability were enhanced with the doping of ‘Co’ in MgZn nanoferrites. Response of the Co doped MgZn nanoferrites at high frequency regime was also evaluated. It can be seen that the response from all the Co doped MgZn nanoferrites was 2.84 GHz–5.96 GHz respectively and suggested the use of these nanoferrites for the operation of nanodevices in the X-band high frequency regime.

Study of physical properties towards optimizing sintering temperature of Y-substituted Mg-Zn ferrites

Optimum sintering temperature (Ts) plays an important role in controlling densification and growth of grains which greatly affect the magnetic and electrical properties of polycrystalline materials. Y-substituted Mg-Zn [Mg0.5Zn0.5YxFe2−xO4 (0 ≤ x ≤ 0.05)] ferrites have been prepared by using conventional standard ceramic technique and were sintered between 1100 and 1300 °C in the steps of 50 °C. Characterizations of the samples have been done by X-ray diffraction (XRD) technique, field emission scanning electron microscopy (FESEM), dielectric and permeability measurements to find the suitable Ts. XRD data have been analyzed and the results confirmed the same information regarding phase analysis at different Ts. Further characterization of the samples, sintered at 1100 and 1150 °C, were not continued due to their low density and high porosity. FESEM images indicate the change in microstructure with Ts. The decrease (increase) of ac electrical resistivity with Ts (Y content) has been observed while the dielectric constant behaves in opposite manner. Impedance spectroscopy also exhibited similar trend as ac electrical resistivity. The initial permeability revealed the wide stability zone of frequency and different optimum Ts for different compositions. The ac resistivity values for the compositions have been found higher at 1200 °C, but the compositions have highest value of bulk density and permeability at other Ts. The effect of Ts on the physical properties (bulk density, porosity and permeability) of Y-substituted Mg0.5Zn0.5YxFe2−xO4 (0 ≤ x ≤ 0.05) ferrites elucidate that the optimum Ts should be of 1250 °C for x = 0.01, 0.02 and 0.03 while the Ts should be of 1300 °C for x = 0.04 and 0.05.

Enhancement in A-B super-exchange interaction with Mn substitution in Mg-Zn ferrites as a heating source in hyperthermia applications

Abstract We report nanoparticles of Mn 2+ doped Mg 0.5 Zn 0.5−x Mn x Fe 2 O 4 ( x = 0, 0.125, 0.250, 0.375, 0.500) ferrites synthesized via co-precipitation route for hyperthermia applications. The prepared samples have been characterized by XRD, FT-IR, FE-SEM, VSM and Photoluminescence spectroscopy for various physical properties. The variation in structural parameters has been obtained with Mn 2+ substitution. The confirmation of intrinsic vibration of metal ions at octahedral sites and tetrahedral sites obtained with the help of FT-IR spectra has been reported. The inception of soft-ferri-magnetic behaviour with Mn 2+ substitution ( x > 0) has been obtained. The variation in magnetic behaviour with Mn 2+ substitution indicates enhancement in A-B super-exchange interaction. The confirmation of enhancement in A-B super-exchange interaction with the help of Yafet-Kittel angles and proposed cation distribution has also been reported. The room temperature photoluminescence spectra show a non-linear variation in band edge emission with Mn 2+ substitution. The nanoparticles have shown soft ferri-magnetic behaviour for Mn 2+ doped samples and results support the candidature of synthesized nanoparticles for hyperthermia applications.

Structural and magnetic properties of Mg-Zn ferrites (Mg1−xZnxFe2O4) prepared by sol-gel method

In this study, the Mg1−xZnxFe2O4 nanoparticles (x=0–0.9) were prepared by sol-gel method. These ferrites exhibit an inverse spinel structure and the lattice parameter increases as the substitution of Zn2+ ions is increased. At lower Zn content (0.1≤x≤0.5), saturation magnetization (Ms) increases, while it decreases at higher Zn content (x≥6). The remnant magnetization (0.17–2.0emu/g) and coercive field (6.0–60Oe) indicate a ferrimagnetic behavior. The average core diameter of selected ferrites is around 15nm and the nanoparticles morphology is quasi spherical. The heating ability of some Mg0.9Zn0.1Fe2O4 and Mg0.7Zn0.3Fe2O4 aqueous suspensions indicates that the magnetic nanoparticles can increase the medium temperature up to 42°C in a time less than 10min

Influence of the magnetic dead layer thickness of Mg-Zn ferrites nanoparticle on their magnetic properties

Nanoparticle ferrite with chemical formula Mg(1−x)ZnxFe2O4 (where x=0.0, 0.2, 0.4, 0.6, 0.8 and 1) were prepared by sol-gel technique. Single phase structure of these ferrites was confirmed using X-ray diffraction (XRD). Transmission Electron Microscope (TEM) showed that the particle size of the samples in the range of (5.7–10.6nm). The hysteresis studies showed superparamagnetic behaviour at room temperature. The magnetization behaviour with Zn-content is expressed in the light of Yafet-Kittel angles. The dead layer thickness (t) was calculated and its effect on the magnetization and magnetic losses was debated. The Specific Absorption Rate (SAR) in an alternating magnetic field with frequency 198kHz for these ferrites has been studied. It is found that, the thickness of magnetic dead layer of the surface of the materials has greatly affected the SAR value of the samples.

Effect of Mn2+ substitution on structural, electrical transport and dielectric properties of Mg-Zn ferrites

Here we have investigated the effect of Mn2+ substitution on the structural, electrical transport and dielectric properties of Mg-Zn ferrite having chemical formula MnxMg0.5−xZn0.5Fe2O4 (0.00≤x≤0.30) synthesized by an oxalate precursor chemical method. X-ray diffraction study reveals the formation of single cubic structure with spinel lattice symmetry without secondary phases having the crystallite size in the range from ~ 25.35−30.36nm. The Mn2+ substitution leads to the expansion of spinel lattice unit cell of Mg-Zn ferrite system as evidenced from the increase of lattice constant (a) with respect to Mn2+ content. Decrease in the d.c. electrical resistivity as a function of temperature confirms the semiconducting nature of the Mn2+ substituted Mg-Zn ferrite; which is attributed to the Verwey hopping mechanism between Fe2+⇔ Fe3+ ions and Mn2+⇔ Mn3+. The frequency (100Hz−1MHz) dependence dielectric properties viz. dielectric constant and dielectric loss measurement shows the usual dielectric dispersion in accordance with the Maxwell-Wagner type interfacial polarization. The a.c. resistivity measurement (100Hz−1MHz) suggests the small polaron hopping type conduction is present in the Mn2+ substituted Mg-Zn ferrite system.

Study of the influence of doping admixtures on the microstructure and properties of radio-absorbing Mg-Zn ferrite materials

In this work we have studied the influence of ТiO2 and Bi2O3 doping admixtures and impurities on the microstructure and properties of radio-absorbing Mg-Zn ferrites. The morphological peculiarities of inclusions of these admixtures in a ferrite ceramics are established. It is shown that the use of doping admixtures and impurities of these oxides makes it possible to control the frequency dependences of the magnetic permeability and dielectric permittivity of Mg-Zn ferrite materials. Examples of controlling the absorption spectra in a radio frequency range through variations in the composition of given radio-absorbing materials are presented.

Investigation of magnesium substituted nano particle zinc ferrites for relative humidity sensors

Nano particle Spinel ferrites, the magnetic semiconductor, are exhibiting remarkable surface phenomenon, wherein the process of adsorption is most significant. Humidity sensing is the realization of adsorption mechanism. Therefore, ferrites would be suitable for humidity sensing applications. Considering this fact into account, the compositions of polycrystalline Mg-Zn ferrites have been prepared by chemical route and characterized by standards tools like X-ray powder diffraction and FTIR spectroscopy. From the results of X-ray diffraction investigation, formation of single phase compositions is confirmed. The resulted structure is FCC with 311 as a prominent reflection. Average particle size obtained by using Scherrer method is within the range from 40nm to 48nm. The existence of the nanoparticles results into increase of the surface area required to favour adsorption mechanism. The significant absorption bands were observed for higher range of frequencies in FTIR, which are attributed to the modes of vibration of water molecules. Therefore, it can be used for development of the humidity sensor. The relative humidity sensor is designed by depositing thick film of the materials under investigation on ceramic substrate. Electrical resistance of the sensor (RH) reveals decreasing trend with increase in the relative humidity. Relative deviation in the resistance (RDR) with humidity depicts two significant regions attributed to the existence of protonic conduction mechanism. The sensor, developed from x=0.40, reveals good linearity over wide range of humidity from 40%RH to 75%RH, which suggests its suitability for sensor development. Moreover, the features of the composition for x=0.40 is suitable for design of electronic interfaces required for instrumentation. The sensitivities of the compositions less than 1s for 10% variation in the relative humidity. This confirms that the humidity sensors developed by employing compositions of ferrite on ceramic substrate are very fast and reliable.