Article
Materials Science, Multidisciplinary
Sani Kundu, Toton Sarkar, Ashis Bhattacharjee
Summary: Hematite nanomaterials were synthesized by thermal decomposition of different precursors, and the dielectric properties and conduction mechanisms were studied. The hematite nanomaterials exhibited particle-size-dependent high dielectric constant, highlighting their potential for applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ramesh Kumar, Amarjeet Kaur
Summary: The chemical synthesis of graphene oxide (GO) by improved Hummer's method was confirmed using Raman and FT-IR spectroscopy. The dielectric relaxation studies of GO revealed different conductivity characteristics at different temperatures, with potential applications in giant dielectric constant.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Environmental Sciences
Rajesh Rohilla, Satish Khasa, Ashima Hooda
Summary: Glass-ceramics with novel composition have been synthesized using melt quench technique, and their dielectric and electrical properties have been characterized. The results indicate that these glass-ceramics show promising potential as eco-friendly and safe dielectric materials.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
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
Materials Science, Ceramics
M. A. Almessiere, B. uenal, S. Ali, A. Baykal, Y. Slimani, A. V. Trukhanov
Summary: Hard/soft SrFe10O19/x(Ni0.8Zn0.2Fe1.8Cr0.2O4) nanocomposites were synthesized using a one-pot citrate sol-gel method. The structural, dielectric, and microwave absorption properties of the NCs were investigated, and the results showed that the conductivity and dielectric properties are composition-dependent, with the addition of a soft magnetic phase leading to decreased reflection losses in the 2-10 GHz frequency range.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Multidisciplinary
Disha Sunil Aherrao, Charanjeet Singh, V. L. Mathe, Pradip K. Maji, A. K. Srivastava
Summary: In this study, Co2+ and Al3+ doped M-type Ba-Sr hexagonal ferrite was synthesized using the sol-gel method. The crystal structure and grain morphology were examined by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). The optical band gap was determined by ultraviolet visible spectroscopy (UV-vis). The dielectric, impedance, electric modulus, and conductivity characteristics were investigated using impedance analyzer at room temperature. The results showed that the structural parameters confirmed the formation of M-type hexagonal crystal structure along with traces of spinel and magnetite phase. The doping Co2+/Al3+ led to a contraction of the unit cell and a reduction in lattice constants. The grain morphology revealed a change in grain shape with doping and the formation of needle-shaped and hexagonal-shaped grains. The study of the dielectric spectrum exhibited a doping-dependent decrease in dielectric constant and an increase in loss tangent. The electric modulus spectra confirmed the non-Debye type behavior of the material and conductivity relaxation was exhibited in conjunction with different relaxation times. Both relaxation time and ac conductivity decreased with an increase in doping content. The simulated complex impedance curves using electrochemical impedance spectroscopy (EIS) software were in agreement with the measured impedance values of the prepared compositions. The observed trend in calculated grain and grain boundary parameters is in agreement with the grain/grain boundary distribution depicted in micrographs.
Article
Water Resources
Mohamed Mahmoud Gomaa
Summary: This article explores the electrical properties of synthetic specimens and finds that their response depends on pH and surface charge. Experimental results show variations in electrical parameters within the frequency range of 0.1 to 10(5) Hz. The study also highlights the influence of frequency, concentration, composition, and arrangement on the electrical characteristics.
APPLIED WATER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Shafiqul I. Mollik, Rabeya Binta Alam, Muhammad Rakibul Islam
Summary: In this study, a bio-compatible plasticized starch/reduced graphene oxide (PS/rGO) nanocomposite was fabricated using a facile aqueous casting method. The structural properties and surface morphology of the nanocomposite were analyzed and revealed increased interaction between the PS matrix and rGO, along with improvements in optical absorbance, dielectric properties, and AC conductivity. The incorporation of rGO led to improved conductivity, reduced grain boundary resistance, and increased capacitance in the nanocomposite.
Article
Materials Science, Multidisciplinary
Ali H. Bashal, Tokeer Ahmad, Umar Farooq, Talat Habeeb, Hanaa AL-Refai, Mohammed Khalafalla
Summary: In this study, undoped and Zn and Co incorporated bentonite samples were successfully synthesized and characterized. The incorporation of metal ions was found to improve the dielectric properties of bentonite samples, especially at high temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Anjli Sharma, Ashima Makhija, Deepika Yadav, Sajjan Dahiya, Anil Ohlan, R. Punia, A. S. Maan
Summary: This work reports on the electronic transport properties of SrxSn1-xS2 (x = 0, 0.02, 0.04, 0.06 and 0.08) nanoplates synthesized using the hydrothermal method. The AC conductivity, electric modulus, and impedance spectra of the nanoplates were studied in a frequency and temperature range. The results reveal different conduction mechanisms for different values of x, and a modified model was used to explain the electric modulus behavior. The activation energy values estimated from conductivity and electric modulus analysis were found to be consistent.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2024)
Article
Materials Science, Ceramics
Saiqua Siddiqui, Divyanshu Singh, Priyanka Singh, Brajendra Singh
Summary: In this study, La0.55Li0.35TiO3-& delta; (LLTO), La0.55Li0.35Ti0.9Cu0.1O3-& delta; (LLTCO), and La0.55Li0.35Sr0.1Ti0.9O3-& delta; (LLSTO) samples were prepared by solid state reaction method. It was found that LLTO exhibited the highest dielectric constant, while LLSTO had the lowest dielectric loss. X-ray diffraction technique and UV-visible diffuse reflectance spectroscopy were used to investigate the crystal structure and optical properties of the samples.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Sudhanshu Kumar, A. K. Shukla, K. Sreenivas
Summary: This study investigates the conduction mechanism in magnesium ferrite ceramics through dc conductivity, dielectric, impedance, and modulus spectroscopy. The results show that the conductivity changes with temperature, and the AC conductivity follows a specific power-law pattern.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(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
Chemistry, Inorganic & Nuclear
S. J. Sondarva, D. V. Shah
Summary: This study synthesized polycrystalline Mn3-xCrxTeO6 (MCTO) compounds using the SSR method and investigated the non-Debye relaxation mechanism and correlated barrier hopping mechanism in Cr-doped MCTO compounds, laying the foundation for their applications in the field of multiferroics.
SOLID STATE SCIENCES
(2022)
Article
Chemistry, Physical
N. Sandhya Rani, H. D. Swapna, R. Karthik, C. Manasa
Summary: The solution casting technique was used to synthesize film samples of hydroxypropyl methylcellulose (HPMC)/poly vinylalcohol (PVA) blends embedded with various concentrations of copper oxide (CuO) nanoparticles. The research focused on the structural analysis, conductivity properties, and electrical characteristics of the polymer electrolytes. The results showed that increasing the concentration of CuO decreased the crystalline size and percentage of crystallinity, thereby affecting the conductivity properties. The uniform dispersion of nano CuO in the polymer was confirmed through surface morphology and phase formation analysis. Frequency and temperature analysis revealed that the AC conductivity increased with increasing frequency and temperature. The findings of this study have important implications for the application of these nanocomposite polymer electrolytes in electrochemical cell devices.
Article
Physics, Condensed Matter
A. Jbeli, N. Zeiri, N. Yahyaoui, P. Baser, M. Said
Summary: The electronic and optical properties of CdSe/ZnSe semiconductor core/shell quantum dots with hydrogenic donor impurity were investigated theoretically. The perturbation and variational methods were used to calculate the binding energy, photoionization cross-section, polarizability, and diamagnetic susceptibility of the excited impurity under various conditions. A significant stark shift in the binding energy was observed under the influence of an external electric field.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Rahat Batool, Tariq Mahmood, Sajid Mahmood, Abdul Aziz Bhatti
Summary: This study investigates the effects of alkali metal doping (Na, K, Cs) on MAPbI3 through compositional engineering. The results show that doping Na, K, and Cs can improve the phase stability, thermodynamic stability, and optical absorption of MAPbI3.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
N. A. N. M. Nor, M. A. H. Razali, W. H. A. W. K. Annuar, N. N. Alam, F. N. Sazman, N. H. M. Zaki, A. S. Kamisan, A. I. Kamisan, M. H. Samat, A. M. M. Ali, O. H. Hassan, B. U. Haq, M. Z. A. Yahya, M. F. M. Taib
Summary: This study investigates the potential of quaternary chalcogenides semiconductors as thin film solar cell absorbers using density functional theory (DFT) and density functional theory plus Hubbard U (DFT + U) approach. The results show that by applying Hubbard U terms, the electronic band gaps can be accurately predicted, providing valuable insights for finding cost-effective new thin film solar cell materials.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Ashwani Kumar, Anuj Kumar, Mohaseen S. Tamboli, Mohd Ubaidullah, J. Jayarubi, S. K. Tripathi
Summary: In this study, lead-based perovskite solar cells are replaced by bismuth-based perovskite cells to overcome their instability and toxicity. CsBi3I10 perovskite films are fabricated using a modified drop-casting process, and the effects of post-annealing temperature on the morphological, structural, and optical properties are investigated. The photovoltaic performance of the cells without a hole transport layer is also quantitatively evaluated.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yang Gao, Shu-Ming Chen, Shuo Cao, Shang-Zhou Zhang, Philippe Djemia, Qing-Miao Hu
Summary: This study investigates the phase stability, elastic modulus, and hardness of ternary nitride Ti1-xAlxN. It is found that the hardness increases with the Al content x. The cubic B1 structure is more stable for x < about 0.75, while the hexagonal structure (B4) is more stable for x > about 0.75. The composition dependent hardness and phase decomposition contribute to the convex shaped hardness curve of Ti1-xAlxN.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Fengqi Wang, Qinyan Ye, Xulin He, Kun Luo, Xiaolong Ran, Xingping Zheng, Cheng Liao, Ru Li
Summary: This report uses rigorous calculations based on density functional theory to study the piezoelectric and elastic properties of wurtzite aluminum nitride (w-AlN) with single- and co-alloying by Hf (or Zr) and Sc. The research finds that the (HfSc)0.375Al0.625N and (ZrSc)0.375Al0.625N with stable wurtzite phase have a large piezoelectric coefficient d33 of 49.18 pC/N and 47.00 pC/N, respectively. However, the piezoelectric voltage constant g33 and electromechanical coupling constant k233 of HfAlN, ZrAlN, HfScAlN, and ZrScAlN are smaller than that of ScAlN, which is attributed to the large dielectric constant epsilon 33 of Hf (or Zr) alloying samples. Furthermore, the calculations of internal parameter u and bond angle alpha elucidate the brittle-to-ductile transformation in alloying w-AlN crystal structure. Electronic structure calculations show that the bandgap decreases almost linearly with the increase of alloying concentration, and the Hf (or Zr) alloying compounds become n-type semiconductors due to the existing high-charge states.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
S. R. Athul, K. Arun, S. Swathi, U. D. Remya, Andrea Dzubinska, Marian Reiffers, Nagalakshmi Ramamoorthi
Summary: The magnetic and magnetocaloric characteristics of Ho6FeSb2 have been studied. The compound exhibits two second-order ferromagnetic transitions, enabling hysteresis-free magnetocaloric effect across a wide temperature range. The alloy has high relative cooling power and magnetoresistance, making it suitable for hysteresis-free magnetocaloric applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: A polycrystalline double perovskite La2CoMnO6 sample was prepared and its structural, dielectric and magnetic properties were investigated. The sample exhibited complex structures and magnetic behavior, and showed good conductivity and dielectric performance. Its multi-domain magnetic structure suggests its suitability for memory device applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Shubha Dubey, Jisha A. Abraham, Kumud Dubey, Vineet Sahu, Anchit Modi, G. Pagare, N. K. Gaur
Summary: This study investigates the optoelectronic, thermodynamic, thermoelectric, and mechanical stability properties of RhTiP Half Heusler semiconductors. The results show that RhTiP is a non-magnetic material with confirmed mechanical stability. It is found to be an indirect-bandgap semiconductor with a good Seebeck coefficient. This study suggests that RhTiP has promising applications in the thermoelectric and optoelectronic fields.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Xun Xie, Jiong-Ju Hao, Hong-Wei Yang
Summary: This work presents a multilayer film structure that uses optical resonance to prepare highly efficient and saturated red, green, and blue transmittance colors. Numerical simulations and analysis show that the structure can produce R, G, and B colors with a purity comparable to standard RGB colors, while maintaining efficient transmission efficiency and obtaining a rich variety of structural colors. Additionally, a metallic interlayer is introduced to selectively suppress resonances in the short-wavelength region, improving the purity of the red color. The study also investigates the effect of the incidence angle on color purity and transmission efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yueqiang Zhao
Summary: Solubility property is of great interest in chemical, physical, pharmaceutical, material, and environmental sciences. Understanding the intrinsic reason behind solubility behavior is a fascinating task. The theoretical relation between binary mutual solubility and liquid-liquid interfacial tension has been derived, where the partitioning of solute molecules between two coexisting liquid phases is determined by the transfer free energy per unit segment for a chain-like solute molecule expressed in terms of solute-solvent interfacial tension. This general theory of solubility is in good agreement with experimental results for binary mutual solubility and molar transfer free energy of solute molecules.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Osama K. M. Bashiar, R. E. Kroon, H. C. Swart, R. A. Harris
Summary: ZnO thin films with near-infrared emission were successfully fabricated using pulsed laser deposition under vacuum conditions, without the need for additional gases or implantation methods. The NIR emission was hypothesized to be caused by defects in the ZnO film due to high energy particle impacts on the sample surface.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
O. Stognei, A. Berezutskii, I. Anisimov, A. Deryabin
Summary: The influence of ZrOn matrix stoichiometry on the electrical and magnetoresistive properties of Fe-Zr-O nanocomposites has been studied. It was found that the magnetoresistive effect is not observed in composites with oxygen lack, while composites with oxygen excess show magnetoresistive effect and increased resistivity. Magnetoresistivity in composites with oxygen lack only appears after heat treatment. These results can be explained by the difference in the density of localized states in the oxide matrix of the composites and the ratio between two types of conductivity.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Mehmet Bayirli, Aykut Ilgaz, Orhan Zeybek
Summary: The present study aims to understand the relationship between impedance characteristics and fractal behaviors. By producing neat and carbon nanotube doped composite specimens, the researchers investigated the electrical properties and surface heteromorphology using Nyquist plots and fractal analysis.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
M. I. Khan, Saddam Hussain, Muhamad Saleem, Fatimah Mohammed Alzahrani, Muhammad Siddique, M. S. Hassan, Allah Ditta Khalid, Munawar Iqbal
Summary: The sol-gel method was used to deposit Ti-doped MAPbBr3 films on FTO-glass substrates with different doping ratios (0%, 4%, and 6%). XRD analysis confirmed the cubic structure of all films, and the 4% Ti-doped film exhibited a large grain size, low band gap energy, and high refractive index. Solar cells fabricated using the 4% Ti-doped MAPbBr3 film showed improved performance in terms of current density, open circuit voltage, fill factor, and efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
