Article
Materials Science, Multidisciplinary
Samia A. Saafan, Mostafa K. El-Nimr, Marwa M. Hussein, Maha K. Omar
Summary: The study prepared Mg Zn nano-ferrites, benzoxazine monomer, polybenzoxazine polymer (PBZ), and PBZ/ferrite composites with different weight ratios through citrate-nitrate auto combustion and co-precipitation methods. The FTIR analysis showed the presence of ferrites and PBZ in the composites, while the results of conductivity and dielectric constant were consistent and mutually reinforcing, indicating potential applications in semiconductor element mounting boards.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Inorganic & Nuclear
J. Lakshmikantha, G. Krishnamurthy, B. M. Nagabhushan, E. Melagiriyappa
Summary: Nanosized M-type hexaferrites Sr(1-x)GdxFe12O19 were synthesized and the influences of Gd3+ ions substitution on their structural, electrical and magnetic properties were investigated. The study found that increasing Gd3+ ion content resulted in larger lattice parameters, decreased dielectric constant, increased AC conductivity, and decreased magnetic parameters. In addition, vibrating sample magnetometer analysis confirmed the hard magnetic behavior of M-SrHF.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Kiran Naz, Junaid Kareem Khan, Muhammad Khalid, Muhammad Saeed Akhtar, Zaheer Abbas Gilani, H. M. Noor ul Huda Khan Asghar, Gaber A. M. Mersal, Mohamed M. Ibrahim, A. Muhammad, M. G. B. Ashiq
Summary: A series of nickel substituted copper spinel ferrite nanoparticles were fabricated using sol-gel auto-combustion technique. The structural properties of the compound were determined through X-ray diffraction analysis. The dielectric properties of the synthesized nanomaterials were observed to vary with the nickel concentration, suggesting their potential application in microwave devices.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Junaid Kareem Khan, Muhammad Khalid, Ali Dad Chandio, Kiran Shahzadi, Zaheer Uddin, Ghulam Mustafa, Muhammad Saeed Akhtar, Naimat Ullah Channa, Zaheer Abbas Gilani
Summary: Spinel ferrites are widely studied due to their practical high frequency applications. Nickel spinel ferrites with varying aluminum doping concentrations were prepared and the dielectric properties were investigated.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Polymer Science
M. Raghavendra, N. Vinayakaprasanna Hegde, Gubran Alnaggar, H. B. Ravikumar
Summary: Polyisobutyl methacrylate (PiBMA)/ferrous-ferric oxide (Fe3O4) polymer nanodielectric films with different wt% of Fe3O4 nanoparticles were prepared and their dielectric properties were investigated. The results showed an increasing trend of free volume parameters and AC conductivity with the increase of Fe3O4 nanoparticle wt%. The increased dielectric constant was attributed to the increased interfacial and orientation polarization effects. The increased electrochemical current implied that increased free volume facilitated the diffusion of electrolytic ions into PiBMA/Fe3O4 polymer nanodielectrics.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Chemistry, Physical
Charanjeet Singh, Maria Vesna Nikolic, Sukhleen Bindra Narang, Antonio Sergio Bezerra Sombra, Di Zhou, Sergei Trukhanov, Larrisa Panina, Jasbir Singh, Alex Trukhanov
Summary: This study focuses on the preparation and microwave characterization of composites of M-type hexagonal ferrite with paraffin wax. The influence of Sr2+ ion content on material parameters, including grain morphology, dielectric, magnetic, conductivity, and reflection loss properties, was analyzed. The results indicate that higher Sr2+ ion content leads to lower dielectric and magnetic loss tangent, as well as increased AC conductivity with frequency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Mohsen Elain Hajlaoui, Sirine Gharbi, Essebti Dhahri, Kamel Khirouni
Summary: This research investigates the conductivity and dielectric permittivity of ZnFe2O4 spinel ferrite as a function of frequency and temperature. The results show that the zinc ferrite sample exhibits thermally activated conductivity and high dielectric constant, making it suitable for super capacitor applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Chandresh Kumari, Sandeep Chhoker, Pankaj Sharma
Summary: Chalcogenides glasses Ge17Sb8Se75-xErx were synthesized with different compositions x = 0, 0.4, 0.8, 1.0 using the conventional melt quenching technique. The dielectric and ac conductivity of these glasses were studied in the temperature range of 300-334 K and frequency range of 5 kHz-20 kHz. The results showed that the dielectric constant exhibited orientation polarization. The dielectric loss variations were explained by conduction loss and single polaron hopping of charge carriers based on the Elliot and Shimakawa theory. The compositional variation in the dielectric parameters and conduction mechanism was also explored.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Payal Sengupta, Priyabrata Sadhukhan, Apurba Ray, Souvik Mal, Anar Singh, Ruma Ray, Satyaranjan Bhattacharyya, Sachindranath Das
Summary: This study extensively analyzed the temperature dependent complex dielectric behavior of a promising hybrid perovskite material, propylammonium lead bromide. The structural and morphological properties were studied using XRD and SEM, with findings confirming its potential in device fabrication and UV detection. The influence of grain and grain boundary on resistance was resolved, and the material showed a giant dielectric constant near room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
M. Raghavendra, S. S. Mahesh, P. Dhananjay, S. Srikantaswamy, H. B. Ravikumar
Summary: Barium monoferrite (BaFe2O4) nanoparticles with an average size of 60 nm were synthesized using the microwave hydrothermal technique. Films of Poly(isobutyl methacrylate) (PiBMA)/ Barium monoferrite (BaFe2O4) were prepared with different weight percentages of BaFe2O4 nanoparticles using the solution casting technique. The addition of BaFe2O4 nanoparticles led to increased free volume in PiBMA and weakened crystallization of PiBMA polymer chains, resulting in enhanced AC conductivity and dielectric constant in PiBMA/BaFe2O4 polymer nanodielectrics.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
M. Sameeh, M. Khairy, T. Esawy, W. A. A. Bayoumy
Summary: The nanocrystalline ZnMn2-xCrxO4 (x = 0, 1, 2) were successfully synthesized by combustion method. The prepared samples exhibited super-paramagnetic behavior and semiconductor properties, with increasing electrical conductivity at higher temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Ceramics
Tripta, Pawan S. Rana
Summary: In this work, NiFe2O4@NiO (1:0, 0.9:0.1, 0.7:0.3, 0.5:0.5, and 0:1) nanocomposites were prepared using a co-precipitation process to investigate their structural, dielectric, and optical properties for potential application in wastewater treatment. XRD, FTIR spectroscopy, and TEM were used to study the structural and morphological properties. The particle size was found to increase with nickel oxide content, and the oxidation state was determined using XPS. The impedance, dielectric constant, dielectric loss, and ac conductivity were observed to increase with nickel oxide concentration. The (0.5NiFe(2)O(4)/0.5NiO) nanocomposite exhibited the highest photocatalytic activity, degrading 95.41% of methylene blue dye within 120 min.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
T. A. Taha, Sultan Alomairy, S. A. Saad, H. O. Tekin, M. S. Al-Buriahi
Summary: The study focused on the properties of glass composites containing WO3 prepared by the melt-quenching procedure, showing that the dielectric constant and conductivity of the samples increase at higher temperatures. The analysis indicates that the conduction mechanism in the glass samples mainly follows the correlated barrier hopping model, with activation energy calculations suggesting the involvement of the same charges in multiple processes.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Biomedical
Madeeha Riaz, Manahil Najam, Shafaq Arif, Shazia Farooq, Arshad Mahmood
Summary: This study investigates the structural and biological characteristics of doped Zn, Mg, and Sr Na2O-CaO-Si2O-P2O5 silicate ceramics synthesized by the solid-state method. Crystal growth was induced by doping SrO, MgO, and ZnO, while the undoped sample exhibited amorphous behavior after sintering at 800OC. The Sr-doped sample showed the highest dielectric value and superior bioactivity compared to other samples.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Physics, Multidisciplinary
Ankur Pandey, Swagatadeb Sahoo
Summary: Forsterite powder with different compositions of TEOS and MNH is synthesized using the sol-gel method. XRD, SEM, and EDX techniques are used to analyze the structure, phase composition, surface morphology, and elemental composition of forsterite powder. The dielectric properties of forsterite powder are also studied using a VNA, and the effects of TEOS and MNH on surface morphology and dielectric properties are discussed in detail, particularly in the context of medical implants.
Article
Materials Science, Multidisciplinary
T. M. El-Alaily, M. K. El-Nimr, S. A. Saafan, M. M. Kamel, T. M. Meaz, S. T. Assar
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2015)
Article
Materials Science, Multidisciplinary
S. T. y Assar, H. F. Abosheiasha
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2015)
Article
Chemistry, Physical
S. T. Assar, H. F. Abosheiasha, S. A. Saafan, M. K. El Nimr
JOURNAL OF MOLECULAR STRUCTURE
(2015)
Article
Materials Science, Multidisciplinary
S. T. Assar, H. F. Abosheiasha, A. R. El Sayed
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2017)
Article
Chemistry, Analytical
M. M. Kamel, M. K. El Nimr, S. T. Assar, A. S. Atlam
INSTRUMENTATION SCIENCE & TECHNOLOGY
(2013)
Article
Thermodynamics
H. F. Abosheiasha, S. T. Assar, M. K. El Nimr
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2013)
Article
Chemistry, Physical
S. A. Saafan, S. T. Assar, S. F. Mansour
JOURNAL OF ALLOYS AND COMPOUNDS
(2012)
Article
Materials Science, Multidisciplinary
S. T. Assar, H. F. Abosheiasha
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2012)
Article
Materials Science, Multidisciplinary
S. T. Assar, H. F. Abosheiasha, M. K. El Nimr
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2014)
Article
Materials Science, Multidisciplinary
S. T. Assar, H. F. Abosheiasha, M. K. El Nimr
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2014)
Article
Materials Science, Multidisciplinary
H. F. Abosheiasha, S. T. Assar
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2014)
Article
Chemistry, Physical
S. T. Assar, H. F. Abosheiasha, E. H. El-Ghazzawy
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Materials Science, Multidisciplinary
R. E. El-Shater, H. El Shimy, S. T. Assar
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
H. F. Abosheiasha, Diaa-Eldin A. Mansour, M. A. Darwish, S. T. Assar
Summary: Until recently, multifunctional epoxy nanocomposites (MENCs) have attracted the attention of researchers due to their tunable properties. This study focuses on epoxy/Li0.5Al0.35Fe2.15O4/Al2O3 nanocomposites with varying Al2O3 content. The samples were characterized and it was found that increasing the Al2O3 nanofillers enhances thermal conductivity but decreases thermal stability. The samples also exhibit soft ferrimagnetic behavior. The study explains the interesting results of decreasing electrical conductivity and dielectric properties for the composite samples based on a dual interface nanolayer model.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
S. T. Assar, E. H. El-Ghazzawy, H. F. Abosheiasha
Summary: The dielectric properties of Ni1-xCaxFe2O4 nanoparticles were investigated at different temperatures and frequencies. The results showed that the frequency dispersion of the samples was attributed to the interfacial polarization mechanism, and the variation of the ac conduction depended on the hopping of electrons and holes between ions. In addition, the electrical properties of the samples were influenced by the grain and grain boundary effects. The samples exhibited suitable electrical properties for use as inductor-cores in high-frequency power transformers for telecommunication purposes.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Bibhutibhusan Nayak, S. Narayana Jammalamadaka
Summary: This article presents a method for remote detection of bovine serum albumin (BSA) using modified cantilever beam magnetometry (CBM). By combining a magnetostrictive Fe70Ga30 cantilever with optical detection technique, researchers were able to detect high concentrations of BSA remotely. The results of this study demonstrate the potential of this method in estimating the magnetostriction of thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yu Hao, R. E. Camley, Z. Celinski
Summary: Magnetic particles have various applications and their magnetic state is determined by their size and the strength of an applied magnetic field. Numerical simulations were performed to study the effect of an applied field on the critical size of single-domain magnetic particles, and the critical field at which a particle becomes single-domain was determined.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Nitesh Singh, Naresh Kumar, Dharohar Sahadot, Anil Annadi, Vidyadhar Singh, Murtaza Bohra
Summary: The unique magnetic properties of FM/AFM and hard-FM/soft-FM nanocomposite thin films have significant relevance for numerous applications. The composition and performance of different magnetic phases in the nanocomposite films can be significantly affected by the laser ablation conditions and annealing temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alya Ali Musaed, Samir Salem Al-Bawri, Khaled Aljaloud, Wazie M. Abdulkawi, Mohammad Tariqul Islam, Mandeep Jit Singh, Zaini Sakawi, Husam Hamid Ibrahim
Summary: This research presents a wideband tunable metamaterial for body-centric applications in the millimeter-wave frequency band. The proposed metamaterial has a wide operating frequency range and enhanced gain, making it suitable for improving the antenna performance in 5G wireless communication systems.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Haonan Li, Cong Li, Hailiang Huang, Guodong Hao, Fei Wang
Summary: The electronic structure and ferroelectric-ferromagnetic coupling properties of Y-doped and vacancy-containing GaN-ZnO heterojunctions are systematically investigated. The magnetism in vacancy-containing systems is generated by the spin polarization of unpaired electrons induced by cationic vacancies, while in Y-doped systems, bound magnetic polarons are formed by the orbital hybridization of s-state and d-state electrons of Y-doped elements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Muhammad Ijaz, Hafeez Ullah, Bandar Ali Al-Asbahi, Mati Ullah Khan, Zaheer Abbas, Sana Ullah Asif
Summary: M-type BaFe11.4-xAlxCo0.6O19 hexaferrites with Al3+ substitutions were synthesized using the co-precipitation method followed by Sonochemical process. The synthesized materials were characterized using XRD, FTIR, UV-vis spectroscopy, VSM, SEM, and LCR meter. The results showed that aluminum doping decreased the band gap and enhanced the magnetic and dielectric properties of the hexaferrites, making them suitable for various applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg I. Utesov
Summary: The elementary excitations spectrum of anisotropic frustrated antiferromagnets in the fan phase is discussed. It is found that the low-energy part of the spectrum consists of a gapless phason branch with linear dispersion and a gapped optical branch corresponding to the fan structure amplitude oscillations. In the high-energy part of the spectrum, the excitations are similar to the magnons of the fully polarized phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alexander Ya. Simonovskii, Alexander A. Yanovskii, Arthur R. Zakinyan
Summary: In this study, the departure frequency of vapor bubbles during boiling of ferrofluid in a horizontal magnetic field is experimentally investigated. Two methods, visual and inductive, are used to measure the frequency of bubble departure. The results show that the bubble departure frequency can decrease with increasing magnetic field strength and increase with increasing temperature of the heat-emitting surface. A linear stability analysis is conducted to analyze the influence of the magnetic field on the frequency of bubble formation during ferrofluid boiling.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg Heczko, Michal Rames, Vit Kopecky, Petr Vertat, Michal Varga, Ladislav Straka
Summary: Heusler Ni-Mn-Ga alloys are multiferroic materials that exhibit magnetic shape memory (MSM) phenomena. By doping transition elements into Ni2MnGa alloys, the transformation temperatures can be modified and complex behaviors can be observed, such as the variation in saturation magnetization and the effects of elemental substitution on compound properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Carlos Ariel Samudio Perez, Ariel Flaig de Marchi
Summary: This study investigates the electronic and magnetic properties of the Full-Heusler Fe2MnAs alloy using first-principles calculations. The alloy may form spontaneously and exhibits a ferromagnetic order and high spin-polarization. It can be transformed into a half-metal by contracting the lattice constant. Additionally, certain defects contribute to the spin-polarization of the alloy, making it a fully half-metallic material.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Satish Geeri, Aditya Kolakoti, Prasadarao Bobbili
Summary: In this study, an electromagnetic wave-absorbing material was fabricated using a polymer composite material with fiber orientation and Multiwall Carbon Nanotubes as filler materials, along with a Perfect Electric Conducting material. The experiments demonstrated strong electromagnetic absorbing properties for the composites with PEC-coated and non-PEC-coated materials. Mechanical, thermal, and morphological analysis confirmed the similar trend in properties. CRITIC analysis helped identify the sequence order of sustaining properties for the fabricated composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yankai Chen, Ruoxue Zhang, Yukai An
Summary: The piezoelectricity, valley character, and magnetic properties of 2H-VS2 monolayer were studied, revealing its potential applications in spintronics and valleytronics due to its bipolar magnetic semiconductor characteristics and superior physical properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Leonardo S. Lima
Summary: This study investigates the thermodynamic quantities, such as entropy, specific heat, and magnetic susceptibility, in the next-nearest-neighbors Heisenberg model on a honeycomb-kagome lattice. The linear spin-wave approach is applied to obtain the temperature-dependent behavior of these quantities. Additionally, the entanglement negativity, a quantifier of quantum entanglement, and the spin Hall conductivity are also studied. The results show that all the thermodynamic quantities, as well as the entanglement negativity and spin Hall conductivity, exhibit an increasing trend with temperature. Furthermore, it is found that all the analyzed quantities approach zero in the low-temperature limit, consistent with experimental observations.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxing Wang, Maximilian Kai Reimann, Wang Chen, Yikun Zhang, Rainer Poettgen
Summary: The Mo2FeB2-type compounds RE2Ga2Mg (RE = Tm, Er, Ho) exhibit a large magnetocaloric effect, making them promising for cryogenic magnetic cooling applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)