Article
Environmental Sciences
Umesh Chejara, Anamika Prajapati, Arvind Kumar
Summary: This study synthesized and characterized nano-particles of polycrystalline magnesium and iron ferrite doped with rare earth materials. The electrical properties of these materials were measured, and it was found that they exhibit variation behavior with respect to frequency. The study suggests that these materials may have potential applications in the fabrication of microwave antennas to reduce energy losses.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Physics, Condensed Matter
B. Trinadh, J. Suresh, G. R. Patta, K. Vijaya Babu, Ch Komali, B. Vikram Babu, K. Anjani Devi, B. Sathish Mohan, K. Samatha
Summary: In this study, Co0.7Cu0.2Zn0.1Fe2-xAlxO4 nano-ferrites were synthesized using sol-gel auto-combustion process, and their structural, optical, electrical and magnetic properties were systematically characterized. The results showed that these nano-ferrites exhibit strong electrical and magnetic properties as well as structural stability.
SOLID STATE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
R. Sagayaraj, S. Sebastian
Summary: Z-type hexaferrites with polycrystalline characteristics were synthesized using co-precipitation method. The XRD results confirmed the polycrystalline phase and 6 nm particle size of the Z-type ferrite nanoparticles. The FTIR spectrum showed resonances corresponding to tetrahedral and octahedral voids and a stabilized ferrite structure. These special ferrite materials exhibited ferrimagnetic properties and high coercivity, making them useful for microwave absorption, high-frequency applications, and magnetic recording media.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Physics, Multidisciplinary
Abdul Hakeem, Thamraa Alshahrani, Irshad Ali, M. H. Alhossainy, Rabia Yasmin Khosa, Ghulam Muhammad, Abdul Rauf Khan, Hafiz Muhammad Tahir Farid
Summary: This study described the synthesis and assessment of ferrite polymer composites with different properties, prepared by mixing ferrite nanoparticles and polypyrrole. The samples were analyzed for surface morphology, structural properties, and magnetic properties, with results suggesting that samples with 25% and 50% ferrite content may be suitable for hyperthermia applications.
CHINESE JOURNAL OF PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Anil Kumar Nayak, Igor M. Filanovsky, Kambiz Moez, Amalendu Patnaik
Summary: This letter presents a coaxial transmission line-to-substrate integrated waveguide (CT-SIW) transition using an aperture-coupling approach. The method achieves increased bandwidth and reduced insertion loss by attaching two coaxial line supports with coupling apertures at the ends of the substrate integrated waveguide (SIW).
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Theeranuch Nachaithong, Narong Chanlek, Pairot Moontragoon, Prasit Thongbai
Summary: (Co, Nb) co-doped rutile TiO2 nanoparticles were prepared with low dopant concentrations, exhibiting high dielectric permittivity and low loss tangent. Impedance spectroscopy revealed that the ceramics are electrically heterogeneous, with interfacial polarization at internal insulating layers contributing to the low loss tangent.
Article
Materials Science, Ceramics
Poonam Lathiya, Jing Wang
Summary: The study focused on preparing Ni0.4Co0.25Zn0.35Fe2O4 ferrites with the addition of CuO dopants to enhance their magnetic properties, achieving high permeability and low magnetic loss for potential applications in RF and microwave devices. High relative permeability and low magnetic loss were achieved in the frequency range of 100-800 MHz, with the addition of CuO causing a significant increase in permeability. Moreover, the resonance frequency of the ferrites shifted to the GHz range with higher concentrations of CuO dopants.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Ji Wang, Kunlong Li, Gongwen Gan
Summary: The study investigates the influence of Sr2+ ions added to CO((2))Z hexaferrites on microstructure and high-frequency properties. Results show that dielectric properties were enhanced with an increase in Sr2+ ion content, while slight changes in magnetic properties indicate potential for high-frequency antenna applications.
Article
Materials Science, Multidisciplinary
Jakkree Boonlakhorn, Jirata Prachamon, Jutapol Jumpatam, Sriprajak Krongsuk, Prasit Thongbai, Pornjuk Srepusharawoot
Summary: By doping CdF2, the dielectric properties of the CaCu3Ti4O12/CaTiO3 binary-phase system can be improved. With increasing dopant concentration, the grain size decreases, the dielectric permittivity increases, and the loss tangent decreases. Impedance spectroscopy findings suggest that the tremendous dielectric response in this binary-phase system is due to an internal barrier layer capacitor.
RESULTS IN PHYSICS
(2022)
Article
Chemistry, Physical
Feng Gao, Jie Li, Haokai Su, Yahui Sun, Yan Yang, Gang Wang, Xuening Han, Qiang Li
Summary: In this study, Y3-xCaxIn0.6GexFe4.4-xO12 materials were synthesized and investigated for their microstructural, dielectric, and magnetic properties with Ca-Ge co-substitution. The co-substitution did not change the phase formation but enhanced the dielectric and magnetic properties of the materials, making them suitable for high frequency microwave device applications. The optimized microwave properties were achieved at x = 0.4 with Y2.6Ca0.4In0.6Ge0.4Fe4O12, showing narrow FMR linewidth and low loss dielectric loss for high frequency applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Komal Sharma, Shalini Bahel
Summary: Cobalt-substituted magnesium titanate solid solutions were synthesized and characterized for their structural, dielectric, and reflection properties. The results showed that the sample with a composition of Cox Mg1-x TiO3 (x=0.05) exhibited good dielectric properties and could be a suitable substrate material for antennas, filters, and microwave reflectors.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Engineering, Electrical & Electronic
Dora Alejandra Chaparro-Ortiz, Reydezel Torres-Torres
Summary: The research determines the frequency-dependent complex permittivity for a printed circuit board laminate through systematic measurements of an array of striplines. A Debye model is implemented to provide a wideband representation of the relative permittivity and loss tangent, with the characteristic impedance of the lines reconstructed. Causal time-domain simulation results are also achieved.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Chemistry, Physical
Noppakorn Thanamoon, Narong Chanlek, Pornjuk Srepusharawoot, Pairot Moontragoon, Prasit Thongbai
Summary: This study investigates the improvement of giant dielectric properties (GDPs) of TiO2 by co-doping it with Tb and Nb ions. The TNTO ceramics exhibit a compact microstructure and microwave dielectric phases, with low temperature dependence of dielectric permittivity and low tan delta values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Nan Zhang, Bin Jiang, Shanshan Xue, Xiaolong Wang, Tianshuang Wang, Peng Sun, Geyu Lu
Summary: In this study, a novel analysis method based on variation of energy loss was proposed for the first time, and a microwave gas sensor for NH3 detection was successfully developed. The sensor showed a low detection limit, excellent selectivity, humidity-resistance, and good linearity for NH3 concentration.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Thermodynamics
Achmad Maulana Soehada Sebayang, Lidia Puspita Sari Sagala, Perdinan Sinuhaji, Nining Sumawati Asri, Anggito P. Tetuko, Eko Arief Setiadi, Lukman Faris Nurdiansyah, Masno Ginting, Perdamean Sebayang, Muhammadin Hamid, Martha Rianna
Summary: Zn0.6Ni0.2Cu0.2Fe2O4 was successfully synthesized using the co-precipitation method at calcination temperatures of 300°C, 400°C, and 500°C. Characterization through TGA/DSC, XRD, and FE-SEM revealed that optimal properties were obtained at a calcination temperature of 500°C, with values of Ms = 31.79 emu/g, Mr = 12.06 emu/g, and Hc = 331.06.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Physics, Applied
Zi-Hao Wang, Jie Zhao, Li-Li Fu, Liao-Lin Zhang, Chun-Xiao Liu
Summary: This study reports on the preparation of optical waveguides in Dy3+-doped Y3Al5O12 transparent ceramics using proton implantation. The fabricated waveguides exhibit a high-quality waveguide structure and efficient light propagation.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Ahmed Memdouh Younsi, Abdelaziz Rabehi, Lakhdar Gacem, Mohamed Toufik Soltani
Summary: In this study, first-principles calculations were used to investigate the structural, electronic, optical, and magnetic properties of SrCo1-xAxO3 (A=Fe or Cr, x=0.125 and 0.25) materials. It was found that the doping of Fe increased the magnetic moment and all materials exhibited metallic conductivity. The variations in the real part values suggested a Drude-like dielectric function behavior for this material.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
L. Derbali, F. Bouhjar, A. Derbali
Summary: This study reports on the deposition of highly transparent conducting n-type zinc oxide (ZnO) thin films on FTO substrates, using an optimized doping process. The results showed that 4% vanadium (V) doping significantly enhances the crystallinity of the thin films, improves the electrical conductivity and reduces deep level defects in ZnO. The V-doped ZnO thin films exhibit high transparency, enhanced UV emission, and improved carrier mobility, leading to higher photocatalytic performance.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Lu Li, Xinpei Li, Lianhe Li
Summary: This study systematically investigates the effective elastic properties of 1D hexagonal quasicrystal (QC) with spring-type imperfect interfaces. The numerical results show that the presence of imperfect interfaces reduces the effective elastic constants to some extent, indicating the important role played by the interface in the elastic properties of QC composites.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Probhu Mandal, Ajay Kumar Ghosh
Summary: In this paper, we have extracted the transport critical current density (Jc) of BaZrO3 added YBa2Cu3O7-delta by using several low electric field criteria. The temperature dependence of Jc and JcG is strongly affected by the choice of electric field criteria, especially at lower temperatures. We have also studied how different criteria may change the extraction of associated coefficients and found that the extrapolated Jc and JcG are highly sensitive to the criteria used.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Zhenghao Cai, Zhiwen Wang, Hongyu Zhao, Ming Li, Bowei Li, Liangchao Chen, Hongan Ma, Xiaopeng Jia
Summary: In this study, the growth characteristics and surface growth process of diamond crystals were further investigated by controlling the impurity content. The results showed that the spontaneous nucleation rate, growth characteristics, and impurity concentration of diamond crystals were significantly affected by the introduction of impurities. The presence of impurities blocked the mutual diffusion between the metal solvent and carbon source, resulting in a decrease in the growth rate of diamond crystals and hindering the surface processes of diamond growth.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Ruizhi Yang, Yunkai Li, Wanpeng Lin, Jun Xu, Lige Wang, Jing Liu
Summary: Selenium selenide (SnSe) has gained attention for its environmental friendliness and low thermal conductivity. Single-crystal SnSe has high thermoelectric properties but is mechanically weak and difficult to manufacture, making it not suitable for commercial usage. Polycrystalline SnSe is easier to synthesize but has poor thermoelectric performance. In this study, polycrystalline SnSe samples are prepared using hydrothermal synthesis combined with vacuum sintering, and their thermoelectric properties are modified through alkali metal element doping.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Mohammed El Amine Monir, Hadj Baltach, Ibtisam F. Al-Maaitah, A. F. Al-Maaitah, Amel Laref
Summary: The structural, electronic and optical properties of Cu2(1-x)Ag2xO alloys were investigated using density functional theory. The compounds were found to be semiconductors based on the equilibrium lattice parameters and electronic structure calculations. Additionally, the optical properties were calculated.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Yi Liu, Jiangtao Xu, Pingan Liu
Summary: In this study, the melting and annealing behaviors of aluminum nanoparticles were simulated using the ReaxFF reactive force field. The physical properties of aluminum and aluminum oxide were effectively reflected in the simulations. The presence of an oxide layer has an impact on the annealing behavior.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
P. Chandini Pattanaik, S. Jena, S. R. Mishra
Summary: This study investigates the two-dimensional time-dependent flow of nanofluid over a permeable stretching or sinking sheet. The inclusion of a transverse magnetic field, magnetic dissipation, and thermal radiation enriches the flow phenomena. The use of nanofluids is of increasing importance in various industrial applications, as well as engineering and biomedicine.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Muhammad Farooq, Hijaz Ahmad, Dilber Uzun Ozsahin, Alamgeer Khan, Rashid Nawaz, Bandar Almohsen
Summary: This paper investigates the Poiseuille flow of non-isothermal couple stress fluid of Reynolds model between two heated parallel inclined plates using the AHPM and OHAM-DJ methods. The approximate solutions for various flow properties are obtained and compared, showing excellent resemblance between the two methods.
MODERN PHYSICS LETTERS B
(2024)
Article
Physics, Applied
Shyam Lal Gupta, Sumit Kumar, Samjeet Singh Anupam, Samjeet Singh Thakur, Sanjay Panwar, Diwaker
Summary: This study investigates the structural, electronic, mechanical, and thermoelectric properties of the iridium-based Heusler alloys Ir2V (In, Sn). The alloys exhibit half-metallic behavior, with large magnetic moments and mechanical stability, making them promising candidates for high-temperature thermoelectric applications.
MODERN PHYSICS LETTERS B
(2024)
