Article
Chemistry, Physical
Amine Bendahhou, Pascal Marchet, Soufian El Barkany, Mohamed Abou-salama
Summary: Research on tungsten bronze compounds Ba5CaTi2-xZnxNb8O30 shows that Zn can dissolve in the compound and form a structure with P4bm space group; SEM images demonstrate high densification and uniform grain distribution in ceramic materials; Analysis of electrical properties reveals that parameters such as conductivity and charge carrier activation energy are related to the microstructure of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
H. M. Shashanka, P. N. Anantharamaiah
Summary: This study investigates the magnetostrictive characteristics of sintered CoFe2O4 (CFO), Co0.85Ni0.15Fe1.85Ga0.15O4 (CNFGO15), and Co0.85Mg0.15Fe1.85Ga0.15O4 (CMFGO15) ceramics. The CMFGO15 sample exhibits enhanced strain sensitivity at low magnetic fields compared to the other two samples, with a maximum strain sensitivity nearly 160% higher than the values found for the other two samples even at remarkable low field.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Inna V. Fadeeva, Dina V. Deyneko, Katia Barbaro, Galina A. Davydova, Margarita A. Sadovnikova, Fadis F. Murzakhanov, Alexander S. Fomin, Viktoriya G. Yankova, Iulian V. Antoniac, Sergey M. Barinov, Bogdan I. Lazoryak, Julietta V. Rau
Summary: Gadolinium-containing calcium phosphates with different synthesis methods have distinct physical and chemical properties, exhibit inhibition effects on bacteria and fungi, and show no toxicity to cells.
Article
Materials Science, Ceramics
Sushrisangita Sahoo, Abhinav Yadav, K. P. Andryushin, P. K. Mahapatra, R. N. P. Choudhary
Summary: The (Gd1-xBax)(Fe1-xTix)O-3 ceramics with different compositions (x = 0.0-0.4) were systematically investigated for their structural transformation, ferro-paraelectric and magnetic ordering induced dielectric phase transitions, multiferroic properties, relaxation and conduction mechanisms. The chemical route was used for material synthesis. Rietveld refinement revealed a structural transformation from orthorhombic to mixed phase for x > 0.2. The analysis of FESEM micrographs indicated a decrease in grain size with the increase in BT in the composition. Dielectric anomalies were explained based on ferroelectric-paraelectric phase transition, polarization induced by a spin reorientation, and antiferromagnetic ordering. The multiferroic properties were studied through various plots. The compositions x = 0.1-0.3 showed improved magnetic properties, making them suitable for spintronic devices. The composition x = 0.3 exhibited a maximum magneto-electric coupling coefficient of 4.77 mV/cm.Oe, making it suitable for magnetoelectric coupling devices.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Parvin Imanipour, Saeed Hasani, Amir Seifoddini, Marcin Nabialek
Summary: In this study, cobalt ferrite magnetic nanoparticles doped with zinc and vanadium were synthesized using the sol-gel auto-combustion method. The samples were characterized using various techniques, and the results showed that doping affected the crystal structure, grain size, and morphology of the synthesized particles, as well as the saturation magnetization and coercivity. These findings are of great importance for understanding the physical properties and applications of cobalt ferrite.
Article
Chemistry, Physical
I. El Heda, J. Massoudi, R. Dhahri, E. Dhahri, F. Bahri, K. Khirouni, B. F. O. Costa
Summary: The structure, elastic properties, and optical properties of two ferrite ceramic materials were investigated. It was found that these compounds exhibit good conductivity and ductile nature, making them suitable for the fabrication of electrical and microwave devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Riyatun, Triana Kusumaningsih, Agus Supriyanto, Budi Purnama
Summary: Silver-substituted cobalt ferrite (Ag0.02Co0.98Fe2O4) nanoparticles were sensitized through coprecipitation method. Increasing annealing temperature resulted in larger crystallite size and grain size. The redistribution of cations led to a perfect spinel structure. Higher annealing temperature led to increased saturation magnetization and coercive field. The antibacterial properties of Ag0.02Co0.98Fe2O4 were demonstrated through evaluation on S. aureus and E. coli, with the most significant effects observed at annealing temperature of 200 degrees C.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Polymer Science
Chandra Sekhar Beera, B. Dhanalakshmi, D. Nirmala Devi, D. Vijayalakshmi, Akanksha Mishra, S. Ramesh, B. Parvatheeswara Rao, P. Shyamala, Melita Menelaou, Nadyah Alanazi, Abdullah N. Alodhayb
Summary: Chromium-doped cobalt ferrite nanoparticles were synthesized and their magnetic properties were studied, showing that the introduction of chromium led to changes in the material's magnetic properties.
Article
Physics, Multidisciplinary
I Ergin, K. Icin, H. Gungunes, B. Ozcelik
Summary: This study investigates the impact of Cu2+ doping on the morphology, structure, optics, magnetism, and Mossbauer features of Co1-xCuxFe2O4 (x = 0.0-1.0) nanoparticles fabricated by the sol-gel auto-combustion reaction method. The XRD patterns reveal primarily pure phase Co-spinel structures. The crystal sizes range from 28.77 to 36.25 nm. FT-IR spectroscopy identifies fundamental vibrational bands at 426 and 602 cm(-1) wavelengths for the nanoparticles. The substitution of Cu2+ ions for Co2+ ions occurs mainly at the A site, but for x = 0.75, some Cu2+ ions are present at both A and B sites. The magnetic measurements show that Cu2+ substitution significantly affects magnetic quantities such as coercivity field (Hc), remnant (Mr), and saturation magnetization (Ms). The magnetic hysteresis curves exhibit well-known S-shaped features for all nanoparticles, with Ms values ranging from 51.5 to 64.4 emu g(-1), Mr values of 31-36 emu g(-1), and H (c ) values of 429.5-1447.8 Oe.
Article
Materials Science, Multidisciplinary
Mehmet Kuru, Fatma Kilic Dokan, Tugba Sasmaz Kuru
Summary: The purpose of this research is to examine the change in structural, magnetic, and electrical properties of Mg0.75Zn0.25AlxFe2-xO4 ferrites with Al3+ contribution. The samples were prepared by co-precipitation technique and characterized using XRD, SEM, FTIR, VSM, and impedance spectroscopy. The results show that the Al3+ contribution leads to an increase in the crystal size, changes in magnetic properties, and variation in dielectric properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
M. Faishal Mahmood, M. Belal Hossen
Summary: The study focused on the preparation of dense ceramics by sintering nanocrystalline ferrites synthesized through Sol-gel method, with Ni0.5Cu0.2Cd0.3Fe2-xLaxO4 ceramics specifically sintered at 900 degrees C. The substitution of La3+ was found to enhance the initial permeability and reduce the dielectric loss tangent of the ceramics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Pawel Peczkowski, Elzbieta Szostak, Ewa Pochec, Jan Marek Michalik, Jaroslaw Pietosa, Tarek Tahraoui, Maciej Luszczek, Lukasz Gondek
Summary: This paper investigates the mechanisms of tuning the magnetic, electronic, and cytotoxic properties of the CoFe2_xLaxO4 system (x≤0.1) by introducing a small amount of lanthanum ions (La3+). It was found that the main mechanism is the complex exchange interaction between the 3d states of cations and the 2p states of oxygen caused by mixing of the metals over the tetragonal and octahedral positions. The synthesized CoFe2_xLaxO4 nanoparticles (NPs) show high impact on cancer cells while having significantly lower toxicity towards normal cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
P. Annie Vinosha, A. Manikandan, R. Ragu, A. Dinesh, K. Thanrasu, Y. Slimani, A. Baykal, Belina Xavier
Summary: The physical properties of nickel substituted cobalt ferrite nanocrystals were investigated in this study, including structural, electrical, magneto-optical, and thermal properties. Various techniques such as XRD, FT-IR, VSM, UV-visible spectra, LCR meter, and photoacoustic spectrophotometer were used for characterization. Increasing nickel substitution led to a decrease in crystallite size and an increase in surface analysis of the synthesized products, making them suitable for high-frequency electromagnetic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
C. Murugesan, K. Ugendar, L. Okrasa, Jun Shen, G. Chandrasekaran
Summary: In this study, nanocrystalline Mn-Zn ferrites were synthesized through a solvent-free combustion reaction method and characterized using various techniques. The results showed that Zn substitution affects the crystallite size and electrical properties of the samples, but does not significantly alter the ionic states. The Zn-substituted manganese ferrite nanoparticles hold promise for high-frequency electronic device applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Ioana Radu, Ina Turcan, Alexandru V. Lukacs, Tiberiu Roman, Georgiana-Andreea Bulai, Marius Andrei Olariu, Ioan Dumitru, Aurel Pui
Summary: Gadolinium (Gd3+) substituted zinc manganese ferrite nanoparticles were successfully synthesized and their various properties were studied, including structure, morphology, magnetic and electrical properties. The results showed that the introduction of Gd3+ ions into the ferrite structure can affect its electrical properties and gas sensitivity.
