Article
Engineering, Electrical & Electronic
V. V. Awati, R. A. Pawar, S. M. Rathod, Santosh S. Jadhav, Mehboobali Pannipara, Abdullah G. Al-Sehemi
Summary: The nanocrystalline spinel ferrite Ni0.3Cu0.2Zn0.5Fe2O4 was prepared by sol-gel self-ignition route, with samples annealed at 400°C and 600°C. Characterization through X-ray diffraction, transmission electron microscopy, vibrating sample magnetometer, elastic and dielectric spectroscopy revealed an increase in crystal size, lattice constant, elastic moduli, Poisson's ratio, saturation magnetization, coercivity, and dielectric parameters with increasing annealing temperature.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Md. Harun-Or-Rashid, M. Nazrul Islam, M. Arifuzzaman, A. K. M. Akther Hossain
Summary: The effects of sintering temperature on the properties of polycrystalline Ni0.3Cu0.2Zn0.5Fe2O4 and Ni0.3Cu0.2Zn0.5Sc0.05Fe1.95O4 compounds have been thoroughly studied. It was found that the different sintering temperatures and scandium doping levels have significant impact on the structural, morphological, magnetic, dielectric, and electrical characteristics of these spinel ferrites. The investigated ferrites exhibit potential for various practical applications due to their high initial permeability, low magnetic loss, and low electrical conductivity across a wide frequency range.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Shilpa Taneja, Deepika Chahar, Preeti Thakur, Atul Thakur
Summary: Bismuth doped Ni-Zn ferrites were synthesized through a citrate precursor method, displaying single phase cubic spinel structures with lattice strain variations. These materials exhibit highly resistive behavior and are suitable for high frequency applications, with changes in dielectric behavior observed with increasing bismuth concentration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Ashok V. Humbe, Sandeep B. Somvanshi, Jitendra S. Kounsalye, Arun Kumar, K. M. Jadhav
Summary: In this study, the influence of trivalent chromium (Cr3+) ion substitution on the electrical, dielectric, and hyperfine interaction properties of a mixed Ni-Zn nanoferrite system was investigated. Experimental results confirmed the significant impact of Cr3+ substitution on the magnetic and electrical properties of the samples, indicating the potential application of the prepared samples in higher frequency systems.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
P. Himakar, N. Murali, D. Parajuli, V. Veeraiah, K. Samatha, Tulu Wegayehu Mammo, Mujasam Batoo Khalid, Hadi Muhammad, H. Raslan Emad, Syed Farooq Adil
Summary: The study investigated the properties of Cu-doped Co-Zn nanoferrites using various analytical techniques and found that lattice constants and crystallite sizes decrease with increasing dopant concentration. Characteristic absorption peaks were detected in the FT-IR spectra, and magnetic parameters showed a tuned variation.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Ceramics
Majid Niaz Akhtar, Muhammad Yousaf, Yuzheng Lu, Muhammad Azhar Khan, Ali Sarosh, Mina Arshad, Misbah Niamat, Muhammad Farhan, Ayyaz Ahmad, Muhammad Umar Khallidoon
Summary: In this study, rare-earth (RE) elements Yb and Gd doped Ni-Zn ferrite samples were prepared and their magnetic, optical, and electrical properties were investigated. The results showed that the samples exhibited excellent magnetooptical and electrical properties, making them promising for applications in nanoantennas, quantum information, sensing, isolators, modulators, data storage, and energy storage devices.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Composites
Anna Kobets, Tatiana Vorobyova, Maria Galuza, Anton Kudaka, Uladzimir Novikau
Summary: This study developed a method for obtaining electroconductive polyacrylate coatings filled with bimetal particles and graphene nanoplatelets. The coatings exhibited high conductivity and can be used for production of conductive elements on glass and other substrates.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
K. Rajashekhar, G. Vinod, K. Mahesh Kumar, J. Laxman Naik
Summary: Rare earth erbium (Er) doped spinel Ni-Cu nanoferrites were prepared and characterized in terms of their structural, optical, and magnetic properties. The results showed that erbium doping transformed the structure of the spinel phase and resulted in a nanostructured sample. The thermal behavior, optical properties, and magnetic properties of the ferrites were found to be dependent on the erbium doping concentration.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
M. A. Abdo, N. M. Basfer, M. S. Sadeq
Summary: The study investigated the optical, structural, and metallization criteria of Mn-Zn-Cr nanoferrites. By analyzing density, FTIR, and optical spectroscopy measurements, it was found that the properties of nanoferrites changed with varying Cr3+ content. Deconvolution of FTIR and optical absorption bands helped reveal hidden absorption bands, aiding in the study of elastic properties of ferrites. Trends in optical band gap and metallization criteria were found to be opposite to those of Urbach energy.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Maxim Guc, Galina Gurieva, Elena Hajdeu-Chicarosh, Susan Schorr, Konstantin G. Lisunov, Ernest Arushanov
Summary: The recent stuck of development of kesterite based photo-voltaic devices is partly due to issues with open circuit voltage, particularly in Cu and Zn containing kesterite compounds. Lattice disorder connected to these cations is considered an important factor, affecting the structural, optical and vibrational properties of the materials. However, detailed investigations on the role of disorder in the electrical properties of kesterite materials are still lacking.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
K. E. Rady, Ahmed Abo Arais, K. M. El-Shokrofy, M. S. Shams
Summary: This study investigates the role of Gd3+ ions in a novel spinel ferrite with a general composition of Mn0.9Zn0.1Ni0.05Ti0.05GdxFe1.9-xO4; 0.0 <= x <= 0.04, and determines the critical concentration of Gd3+ ions that improves the structural and dielectric properties of the ferrite. The study finds that increasing the Gd concentration enhances the physical and dielectric properties of the samples, with an increase in AC resistivity and a 68% reduction in dielectric loss.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Construction & Building Technology
Liyuan Liu, Jinxia Xu, Tianjiao Yin, Yang Wang, Hongqiang Chu
Summary: A novel cement-based composite containing nickel-coated carbon nanotubes (NiCNTs) was fabricated using magnetic field induction for piezoresistive sensor in structural health monitoring system. The oriented Ni-CNTs cement-based composites showed anisotropic conductivity and piezoresistive properties, with the best performance observed in composites aligned parallel to the magnetic field direction.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Chemistry, Physical
Shogo Hashimura, Yudai Yamaguchi, Hayami Takeda, Naoto Tanibata, Masanobu Nakayama, Naohiro Niizeki, Takayuki Nakaya
Summary: This study focused on quaternary Mn-Co-Ni oxides and found that Bayesian optimization can efficiently determine compositions with arbitrary B constants and LogR. In contrast, machine learning regression analysis struggles to achieve the desired control over electrical properties.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Sumi Akter, M. N. I. Khan, Faria Ferdous, H. N. Das, Ishtiaque M. Syed
Summary: In this study, the structural, microstructural, electrical, and magnetic properties of Cr-doped Cu0.5Mg0.5CrxFe2-xO4 (x = 0.0, 0.04, 0.08, 0.12, and 0.16) composites prepared using the sol-gel technique were examined. The results showed that Cr doping significantly affected the magnetic and electrical characteristics of the samples. These materials are suitable for use in high-frequency systems due to their low dielectric loss.
Article
Polymer Science
K. S. Ramakrishna, Ch. Srinivas, S. A. V. Prasad, E. Ranjith Kumar, K. Ramachandra Rao, C. L. Prajapat, T. V. Chandrasekhara Rao, Sher Singh Meena, D. L. Sastry
Summary: The structural and elastic properties of heat-treated NixCu0.1Zn0.9-xFe2O4 nanoferrite powders were investigated. The substitution of Ni(2+) ions led to increases in lattice parameters, crystallite size and particle size. The sintering process promoted the growth of nanoparticle size. The elastic moduli were dependent on both inter-atomic distances and cation redistribution, with a Poisson's ratio of 0.35 indicating isotropic behavior.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ch. Komali, N. Murali, K. Rajkumar, A. Ramakrishna, S. Yonatan Mulushoa, D. Parajuli, P. N. V. V. L. Pramila Rani, Satheesh Ampolu, K. Chandra Mouli, Y. Ramakrishna
Summary: This work used the solid-state reaction method to prepare Mg1-xZnxFe2-yCryO4 (x = y = 0.0, 0.2, 0.4, and 0.6) soft ferrites. Their structural, morphological, vibrational, dc electrical, and magnetic properties were analyzed using XRD, SEM, FTIR, two probe methods, and VSM. All the ferrites had a cubic spinel structure and uniform spherical nanoparticles. Increasing magnesium concentration decreased the DC electrical resistivity, thereby changing the magnetic parameters applicable in daily life.
Article
Chemistry, Inorganic & Nuclear
D. Parajuli, Susmitha Uppugalla, N. Murali, A. Ramakrishna, B. Suryanarayana, K. Samatha
Summary: MXene-Ferrite nanocomposites or nano-hybrids have been rarely studied, but the ones that have been studied show high efficiency in photocatalytic degradation of Congo Red Dye and invisible pollutants. These nanocomposites are also used in advanced electromagnetic wave absorption. In conclusion, MXene-Ferrite nanocomposites have great potential for advanced applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
K. L. V. Nagasree, B. Suryanarayana, Vemuri Raghavendra, Susmitha Uppugalla, Tulu Wegayehu Mammo, D. Kavyasri, N. Murali, M. K. Raju, D. Parajuli, K. Samatha
Summary: Mg2+ and Ce3+ doped Cobalt ferrites were synthesized using the sol-gel auto combustion method. Structural analysis was done using XRD, FESEM, and FTIR. The results showed the formation of spinel cubic structure. High dopant concentrations resulted in increased DC electrical resistance. Substituting Mg2+ and Ce3+ cations at specific sites yielded high-resistance materials with decreased dielectric constant and loss. AC conductivity was lower than the parent material. Magnetic studies showed increased magnetization values and coercivity with higher dopant concentrations.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Rentapalli Vijaya Bharathi, M. K. Raju, Susmitha Uppugalla, Vemuri Raghavendra, D. Parajuli, B. Suryanarayana, S. Yonatan Mulushoa, N. Murali, K. Samatha
Summary: Cu2+ substituted Mg0.5Co0.5Fe2O4 ferrite materials were synthesized using a solid-state reaction method, and their structural, magnetic, and electrical properties were studied. The materials were characterized using XRD, SEM, FTIR, VSM, and DC electrical resistivity apparatus. The XRD patterns showed a single cubic phase and a decrease in lattice constant with increasing copper concentration. The SEM images revealed spherical and polyhedral-shaped grains with agglomerations. The FTIR spectra indicated the nature of ferrite. The VSM study showed soft ferromagnetic behavior, and the DC resistivity exhibited a semiconductor nature with increased Cu2+ concentration.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Dharmana Chinnarao, Ch V. Padmarao, Ch Beena, M. Srilatha, M. V. V. Ramanjaneyulu, Praveen Choppara, N. Murali, B. Venkateswara Rao
Summary: This study investigated the properties of a binary organic liquid mixture of geranyl acetate + benzyl benzoate at different temperatures (303.15K, 308.15K, 313.15K, and 318.15K) by measuring their density, ultrasonic sound velocity, and viscosity. Variations in ultrasonic velocity, intermolecular free length, and adiabatic compressibility were analyzed using experimental data. A Redlich-Kister polynomial was fitted to the calculated excess/deviation functions using multi-parametric non-linear regression analysis to estimate coefficients and standard errors. Molecular interactions between the binary mixtures were studied, and the results were supported by FTIR spectra. Moreover, the anti-bacterial activity of the liquid mixtures and individual compounds was investigated.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Ch. Rambabu, Susmitha Uppugalla, Ritesh Verma, A. Ramakrishna, N. Murali, Ch. Shivanarayana, D. Parajuli, B. Suryanarayana, Khalid Mujasam Batoo, Sajjad Hussain, P. V. Lakshmi Narayana
Summary: Sol-gel auto combustion method was used to synthesize M-type La3+ and Ni2+ substituted strontium nano-hexaferrite powders (Sr1-xLaxFe12-yNiyO19, where x = y = 0.0, 0.05, 0.1, 0.15, and 0.2) successfully. The prepared powders were sintered at 1200 degrees C for 2 h. Various characterization techniques were employed to investigate the structural, morphological, magnetic, and dielectric properties of the samples at room temperature.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
K. L. V. Nagasree, B. Suryanarayana, Vemuri Raghavendra, Apparao Penta, N. Murali, S. Yonatan Mulushoa, K. Samatha
Summary: Co1-xCuxFe2-yCeyO4 (x = 0.0, 0.25, 0.5, 0.75; y = 0.0, 0.03, 0.06, 0.09) Co ferrite nanopowders with Cu-Ce substitution were synthesized using sol-gel auto-combustion method. The effect of Cu-Ce substitution on the structural and magnetic properties was investigated through XRD, FESEM, FTIR, and VSM. Cu-Ce substitution did not alter the crystal structure and no additional characteristic peak associated with Cu2+ and Ce3+ ions was observed in XRD. The average grain size was found to be between 110-128 nm according to FESEM, and FTIR spectra showed shifts in the tetrahedral stretching peaks with increasing Cu2+ and Ce3+ ions content. Cu-Ce substituted cobalt ferrites exhibited strong hysteresis loops with decreased magnetic saturation and increased coercivity at ambient temperature.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
D. Parajuli, Gangasagar Sharma Gaudel, Devendra Kc, Khim B. Khattri, Won-Yeop Rho
Summary: This paper investigates the effect of a single-layer TiO2 anti-reflection coating on GaAs solar cells. The solar cell was simulated before and after the coating using PC1D simulation software. The results show that the coated solar cell performs better, with a reflectivity of around 5% compared to 32% without the coating.
Article
Engineering, Electrical & Electronic
M. Madhu, A. Venkateswara Rao, N. Murali, D. Parajuli, Tulu Wegayehu Mammo
Summary: Nano-ferrites with Al3+ substitution at different concentrations were synthesized using the sol-gel auto-combustion synthesis route. The structural, magnetic, dielectric, and dc electrical resistivity properties of the synthesized samples were investigated.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
D. Parajuli, K. Ramanjaneyulu, N. Murali, A. Ramakrishna, Khalid Mujasam Batoo, K. Samatha, V. Veeraiah
Summary: In this study, the DFT-FP-LAPW method was used to investigate the properties of BiMO3 (M = Al, Ga, and In). The structural, electronic, and optical properties were analyzed through energy band structure, density of states, and charge density calculations. The results showed that there is ionic bonding between Bi-O and a mixture of ionic and strong covalent bonds between M (Al, Ga, In)-O. These materials exhibit potential for applications in various devices such as memories, capacitors, and sensors.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
