Article
Engineering, Electrical & Electronic
Safia Anjum, Mehwish Sattar, Zeeshan Mustafa
Summary: The research investigated the impact of La+3 ions on the structural, morphological, optical, magnetic, and ferroelectric properties of barium hexaferrite samples. The study found that increasing La+3 ions led to a decrease in band energy and changes in magnetic properties, with lower polarizability in most samples suitable for high-frequency applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Pittala Suresh, Binoy Krishna Hazra, B. Ravi Kumar, Tirthankar Chakraborty, P. D. Babu, S. Srinath
Summary: The co-substitution of La3+ and Ho3+ in BiFeO3 significantly affects its structural, electrical, and magnetic properties, suppressing impurity phases, promoting grain growth, and notably increasing the dielectric constant. Additionally, the co-substitution improves magnetic properties, with 'Ho' enhancing magnetization values and 'La' increasing the magnetic coercivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Mahmoud S. Alkathy, J. A. Eiras, Fabio L. Zabotto, K. C. James Raju
Summary: This study explores the effects of Ni2+/Na(+)co-substitution on the properties of Ba1-x(Ni-x/2,Na-x)TiO3(BTNaNi-x) ceramics, revealing a significant reduction in optical bandgap with the presence of oxygen vacancies and octahedral distortion. The increase in Ni2+ and Na(+)content leads to enhanced magnetic properties, with the sample at x = 0.08 exhibiting the strongest magnetic nature compared to others.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
K. Subrahmanya Sarma, Ch. Rambabu, G. Vishnu Priya, M. K. Raju, D. Parajuli, Batoo Khalid Mujasam, Verma Ritesh, Kumar Rajesh, N. Murali, P. V. Lakshminarayana
Summary: M-type Al-Cr-substituted strontium hexaferrite powders were successfully synthesized and their structural, morphological, and magnetic properties were studied. The results showed that the saturation magnetization decreased and the coercivity initially decreased and then increased with increase in dopant concentration.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Gaochao Zhao, Chengbing Pan, Wei Dong, Peng Tong, Jie Yang, Xuebin Zhu, Lihua Yin, Wenhai Song, Yuping Sun
Summary: By co-doping with Cr-Mn, BFC-BTM ceramics achieve a gradual structural transformation from rhombohedral to pseudo-cubic phase, establishing morphotropic phase boundaries. Improved piezoelectric and magnetoelectric properties are observed in samples near the MPB.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Polymer Science
Darine Harrabi, Sobhi Hcini, Jamila Dhahri, Mohamed Amine Wederni, Abdullah H. Alshehri, Abdulrahman Mallah, Kamel Khirouni, Mohamed Lamjed Bouazizi
Summary: We have investigated the effects of sintering temperature on the structural and optical properties of Mg0.6Co0.2Cu0.2FeCrO4 spinel ferrites. The results show that the unit cell parameters, crystallite size, and band gap energy increase with increasing sintering temperature. The optical transitions in the prepared samples are found to be direct, and the decrease in band gap energy and low Urbach energy suggest high sample quality and reduced degree of disorder and defects with increasing sintering temperature. Furthermore, the variations of optical constants with wavelength reveal the importance of the prepared samples in optoelectronic applications.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Sonia Rani, Ompal Singh, Shalu Kaushik, Pooja Sharma, Ashish Agarwal, Sujata Sanghi
Summary: The effect of Dy3+ ion substitution on the structural, dielectric, and magnetic behavior of BiFeO3 ceramics prepared via the solid-state route has been investigated. The substitution of Dy3+ ion with Bi3+ results in a phase transformation and a reduction in crystallite size. High-temperature transient interaction between oxygen vacancies and Fe3+/Fe2+ ions was observed. The addition of Dy improves the magnetic and dielectric properties, making BiFeO3 a suitable choice for data storage media.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
H. G. Abd-Elbaky, M. Rasly, Reem G. Deghadi, Gehad G. Mohamed, M. M. Rashad
Summary: In recent years, the eco-friendly strong-base free synthesis has been applied to the synthesis of spinel cobalt ferrites, leading to successful preparation of the ferrites. By adjusting the composition and structure, the magnetic and optical properties of the cobalt ferrites were controlled, providing a feasible approach for magneto-optical applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Sunil Chauhan, Manoj Kumar, Asif Yousuf, Priyanka Rathi, Mohit Sahni, Satyendra Singh
Summary: The study demonstrates that co-substitution of Na and Co affects the structural, magnetic, and photocatalytic properties of Bi1-xNaxFe1-xCoxO3 nanoparticles, leading to improved magnetic parameters, altered energy bandgap, and enhanced photodegradation efficiency.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
S. S. Kadam, V. D. More, P. K. Gaikwad, K. M. Batoo, Sajjad Hussain, R. H. Kadam, S. E. Shirsath, A. B. Kadam
Summary: The unique structural and physical properties of rare earth doped spinel ferrites, along with their wide applications, have attracted the interest of scientists. In this study, CoCrCexFeO samples with different compositions were synthesized using the sol-gel auto-ignition process. The results showed that increasing cerium concentration led to changes in the lattice lengths and the substitution of Ce3+ for Fe3+. The samples exhibited a narrow size distribution with nanoparticles approximately 50 nm in size. Additionally, the substitution of Ce3+ reduced the saturation magnetization and increased the coercive field, making the samples suitable for permanent magnets.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Chemical
Souvick Das, Ayan Mitra, Sukhendu Sadhukhan, Amitabh Das, Souvik Chatterjee, Pabitra K. Chakrabarti
Summary: Monophasic nanocrystalline lead-free relaxor ferroelectric samples of YFeO3 and Co(0.05)Y(0.95)Fe(0.95)Ti(0.05)O(3) were prepared, and the influence of Co and Ti co-doping on their structural, dielectric, ferroelectric, and magnetic properties was investigated. The results showed enhanced multiferroic properties in the co-doped samples.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
M. A. Abdo, S. F. Mansour, N. S. Al-Bassami, N. Abu-Elsaad
Summary: In this study, CCZY spinel ferrite nanoparticles were prepared using the citrate technique, showing promising properties for applications in data storage and water treatment, due to their unique characteristics such as high saturation magnetization and efficient dye removal capabilities.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Md Abu Mosa, M. K. Das, F. Alam, M. N. Khan, S. C. Mazumdar
Summary: The role of co-doping with Ba and Sm in BiFeO3 has been studied, and it is found that co-doped samples have improved dielectric and electric polarization properties. Sm doping notably increases the real part of initial permeability and relative quality factor, as well as the coercivity of Bi0.85Ba0.15FeO3 ceramics. This study is of great importance for the fabrication of magnetoelectric devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Ahmet Teber, Mehmet F. Sarac
Summary: Co0.5Ni0.5CrxFe2 - xO4 nanoparticles with various chromium concentrations (0.0 <= x <= 1.0) were synthesized using the hydrothermal method. The structural, characteristic, dielectric, and magnetic features of the nanoparticles were analyzed using XRD, FT-IR, SEM-EDS, TEM-SAED, and VSM measurements. The results showed that the nanoparticles had a hexagonal crystal structure and their morphology changed from spherical to oval-shaped with increasing chromium content. The nanoparticles exhibited spinel structure formation and soft ferromagnetic property. The electromagnetic constitutive parameters and microwave absorption properties were determined based on S-parameters and return losses. The microwave absorption occurred in the frequency range of approximately 11 GHz to 12.4 GHz in the X-band and extended towards the Ku-band.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Applied
Jing Chen, Lu Liu, Xiao Li Zhu, Z. V. Gareeva, A. K. Zvezdin, Xiang Ming Chen
Summary: The study investigated the effects of La/Lu co-substitution on BiFeO3 ceramics, and found that this method can introduce the Pna2(1) phase in the ceramics, further enhancing ferroelectric polarization and achieving the transition from antiferromagnetic to weak ferromagnetic state by destroying the cycloidal spin structure.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Ankita Kumari, Surya P. Singh, Nilesh K. Tiwari, M. Jaleel Akhtar
Summary: A new design of highly confined Spoof Surface Plasmon (SSP) line splitter-based differential phase sensor is presented for the THz frequency region, achieving highly confined and compact design. The designed differential splitter improves the dispersion characteristic of stem shaped unit cell, providing a symmetric differential sensing environment. The proposed sensor shows high sensitivity due to improved electric field confinement, with substantial phase difference observed even with small defects.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Aafiya, M. Abushad, M. Arshad, Swaleha Naseem, Hilal Ahmed, Azizurrahaman Ansari, Vishal Kumar Chakradhary, Shahid Husain, Wasi Khan
Summary: Nanoferrites of the chemical formula Ni1-xZnxFe2O4 were synthesized via the sol-gel auto combustion process, and the influence of zinc doping on physical properties was explored. Results showed that zinc doping reduced crystallite sizes, increased dielectric constant and ac conductivity, while the magnetic behavior was affected by the distribution of metal cations.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Inorganic & Nuclear
Nazir Ahmad Mala, Mohd Arif Dar, Mehraj ud Din Rather, S. Sivakumar, Shahid Husain, Khalid Mujasam Batoo
Summary: In this report, Zn and Mn co-doped NiO nanostructures were successfully prepared with improved electrochemical performance. The co-doped nanostructures exhibited enhanced specific capacitance and power density, making them a promising candidate for high-performance supercapacitors by improving the availability of ions in the electrodes for charge storage and rate performance.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Shubhadip Paul, Nilesh Kumar Tiwari, Mohammad Jaleel Akhtar
Summary: In this study, a novel highly directive GRIN metasurface (MS) lens integrated dielectric-filled horn antenna (DFHA) for effective monitoring and detection of deep tumors inside the body is developed. Two novel GRIN MS lens topologies are proposed, both utilizing an optimized refractive index distribution. The proposed lens-based DFHA demonstrates enhanced signal penetration and spatial resolution, making it suitable for tumor detection deep inside the body.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Chemistry, Physical
Nazir Ahmad Mala, Mehraj Ud Din Rather, Raja Nisar Ali, Shahid Hussain, Sobhy M. Ibrahim, Nabi Ullah, Shahid Husain, Zubair Ahmad
Summary: In this study, Mo-Cu dual-doped NiO nanorods were prepared using the hydrothermal method. Characterization techniques including X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy were employed to study the nanorods. Electrochemical analysis revealed their pseudocapacitive nature and high specific capacitance under certain conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Mehraj Ud Din Rather, Asif Nazir Ganie, Nazir Ahmad Mala, Mehroosh Fatema, Daud Ahmad Ansari, Abdul Gaffar Lone, Basharat Want, Shahid Husain
Summary: This study presents the fabrication of particulate multiferroic composites based on ferroelectric perovskite BaTiO3 and ferrimagnetic spinel CoFe2O4. The composites exhibit improved dielectric and magnetoelectric properties at room temperature, making them potential candidates for magnetoelectric devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Apala Banerjee, Prakrati Azad, M. Jaleel Akhtar
Summary: A novel RF sensor is developed and successfully utilized to determine the Sodium ion constituent variation in human body fluid, which is crucial for metabolic functioning. The measured sensitivity for Na+ ions in the body fluid is recorded to be 0.03 dB/(mmol/dm3) for the fabricated RF sensor.
IEEE JOURNAL OF ELECTROMAGNETICS RF AND MICROWAVES IN MEDICINE AND BIOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Najnin Bano, K. Dey, A. Tripathy, P. Garg, U. Deshpande, D. K. Shukla
Summary: In this study, we investigated the effect of dc bias voltage on the dielectric properties of YIG at different temperatures and frequencies. The results showed that the application of a small dc bias voltage can significantly enhance the dielectric constant and reduce the dielectric loss of YIG. Especially at higher temperatures, the dc bias voltage has a pronounced suppressing effect on the grain boundary contributions.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Multidisciplinary
Aref A. A. Qahtan, Anand Somvanshi, Samiya Manzoor, Mehroosh Fatema, M. Abushad, Naima Zarrin, Wasi Khan, Shahid Husain
Summary: This work investigates the temperature dependent electrical and ferroelectric properties of GdCr1-xMnxO3 (x = 0 and 0.3). The results show that the samples exhibit semiconductor-like behavior and their conductivity increases with temperature. Impedance analysis reveals changes in grain boundary resistance, grain resistance, and capacitance upon doping. The ferroelectric measurements indicate a decrease in coercive field and an increase in maximum polarization, remnant polarization, and energy storage in the doped samples.
Article
Materials Science, Multidisciplinary
A. Tripathy, K. Gautam, K. Dey, S. R. Sahu, A. Ahad, A. Upadhyay, A. Sagdeo, S. Francoual, P. J. Bereciartua, I. Gudim, J. Strempfer, V. G. Sathe, D. K. Shukla
Summary: Rare-earth iron borates have attracted considerable interest due to their complex structural and magnetic properties. In this study, the structural phase transition and element-specific magnetic ordering behavior of Ho0.5Nd0.5Fe3(BO3)4 below its antiferromagnetic transition temperature are investigated. The results indicate that the spontaneous electric polarization in this compound emerges through the p-d hybridization mechanism associated with the FeO6 octahedra.
Article
Materials Science, Multidisciplinary
Abdul Ahad, K. Gautam, S. S. Majid, K. Dey, A. Tripathy, F. Rahman, R. J. Choudhary, R. Sankar, A. K. Sinha, S. N. Kaul, D. K. Shukla
Summary: The compound LaSrCoO4 displays a paramagnetic-ferromagnetic phase transition at 220.5 K, followed by a transition to a cluster spin glass state at 7.7 K. The transition is driven by random magnetic anisotropy, which leads to the formation of finite ferromagnetic clusters at low temperatures. The strength of the single-ion magnetocrystalline anisotropy increases with decreasing temperature.
Article
Engineering, Electrical & Electronic
Shubhadip Paul, M. Jaleel Akhtar
Summary: In this article, a novel synthetic aperture radar (SAR) microwave imaging technique is proposed for detecting target objects inside layered media. The technique combines the standard Riccati equation-based reconstruction algorithm with the equivalent time domain approach to accurately estimate the electrical properties and thickness of individual layers. The major innovation lies in the integration of the proposed imaging scheme with the SAR algorithm, enabling accurate detection of targets buried deep within the layered media.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Materials Science, Multidisciplinary
S. R. Sahu, S. S. Majid, A. Ahad, A. Tripathy, K. Dey, S. Pal, B. K. De, Wen -Pin Hsieh, R. Rawat, V. G. Sathe, D. K. Shukla
Summary: Vanadium dioxide (VO2) has attracted substantial attention due to its insulator-to-metal transition and structural phase transition at near room temperature. However, the underlying physics of these transitions in VO2 is not fully understood. In this study, we have investigated the kinetics of these phase transitions using resistivity measurements and Raman spectroscopy. Our results reveal unusual behavior in the thermal hysteresis scaling during the insulator-to-metal transition, while the structural phase transition follows the expected behavior. We also find that the insulator-to-metal and structural phase transitions decouple at higher temperature sweep rates.
Article
Engineering, Electrical & Electronic
Apala Banerjee, Nilesh K. Tiwari, Farheen Fatima, M. Jaleel Akhtar
Summary: An improved planar microwave sensor is presented for assessing the quality of recycled cooking oils. The proposed sensor exhibits improved performance in detecting slight variations in electrical and chemical properties. The experiments show that recycled oils have higher acid values, indicating their adverse effects on human health.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Materials Science, Multidisciplinary
M. Arshad, Wasi Khan, M. Abushad, Samanway Mohanta, Shahid Husain, D. K. Shukla, Azizurrahaman Ansari, Vishal Kumar Chakradhary
Summary: Ceramic based capacitors with superior energy storage performance and high storage energy density play an important role in modern electronic devices. In this study, lead-free BaTi1-xGdxO3 nanostructures were synthesized and the doping of Gd led to the transformation of ferroelectric behavior, resulting in enhanced energy storage efficiency.
MATERIALS RESEARCH BULLETIN
(2024)
