Article
Chemistry, Physical
A. K. Mohamed, V. V. Palacheva, V. V. Cheverikin, T. N. Vershinina, A. M. Balagurov, G. M. Muralikrishna, N. Esakkiraja, S. V. Divinski, G. Wilde, I. S. Golovin
Summary: This study has detected and discussed the significant differences between the properties of Fe-Ga alloys in their metastable and equilibrium states, as well as the discrepancies between existing Fe-Ga phase diagrams and the transition rates from the metastable to equilibrium state. The accurate knowledge of the equilibrium phase diagram, metastable phases, and the transition rates between different phase states towards equilibrium are necessary for both fundamental understanding and technological importance of these alloys, and further clarification is required. By utilizing a coherent set of complementary methods, including diffraction methods, scanning electron microscopy, and electron backscatter diffraction, the influence of alloy composition, annealing temperature, and annealing time on the metastable-to-equilibrium phase transitions in binary Fe-Ga has been studied. Several important changes to the low-temperature part of the binary Fe-Ga diagram near the Fe-rich corner and a new method based on interdiffusion couples for varying the structure and phase states of Fe-Ga alloys have been proposed.
Article
Materials Science, Multidisciplinary
Jianjun Tian, V. N. Ivanovski, M. Abeykoon, R. M. Martin, S. Baranets, C. Martin, Yu Liu, Qianheng Du, Aifeng Wang, Shuzhang Chen, Xiao Tong, Weifeng Zhang, S. Bobev, V Koteski, C. Petrovic
Summary: The study reveals that FeTe2 single crystal exhibits unique magnetic, thermal, and electrical properties, making it suitable for thermoelectric materials design, and it forms in a highly defective marcasite crystal structure.
Article
Materials Science, Coatings & Films
Yanhan Fang, Wenjie Sun, Lu Han, Zeya Li, Haoying Sun, Hongtao Yuan, Zhengbin Gu, Yuefeng Nie
Summary: The magnetic and electrical transport properties of doped manganites can be adjusted by controlling the concentration of oxygen vacancies. This study presents a method for the epitaxial growth of high quality La0.67Sr0.33MnO3-delta films with a large out-of-plane lattice parameter, achieved by using a Sr3Al2O6 buffer layer to stabilize the metastable phase.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Materials Science, Multidisciplinary
Gianluca Gazzola, Marco Ambrosetti, Maria Cristina Mozzati, Benedetta Albini, Pietro Galinetto, Marcella Bini
Summary: ZnFe2O4 nanoparticles exhibit superparamagnetic behavior at room temperature, with maximum magnetization values between 4 and 7 emu/g at an applied magnetic field of 1T. The cationic disorder within the two sublattices has a clear influence on the blocking temperature, affecting the transition to an ordered blocked state at higher temperatures. EPR inspection confirmed the superparamagnetic behavior is related to the inversion degree of the spinel phase.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Egor Gordeev, Semyon Belyakov, Ekaterina Antonova, Denis Osinkin
Summary: Membranes based on complex solid oxides with oxygen-ionic conductivity play a crucial role in high-temperature electrochemical devices. This research investigates the effects of introducing iron cations into the gallium sublattice in (La,Sr)(Ga,Mg)O-3 on the fundamental properties of the oxides and the electrochemical performance of cells. The introduction of iron enhances the electrical conductivity and thermal expansion in an oxidizing atmosphere, leading to increased electrochemical activity and improved power density in fuel cells.
Article
Chemistry, Physical
Loku Singgappulige Rosantha Kumara, Kyohei Ishikawa, Keisuke Ide, Hideo Hosono, Toshio Kamiya, Osami Sakata
Summary: This study confirms the strong influence of impurity hydrogen on subgap electronic states in amorphous In-Ga-Zn-O thin-film transistors using different sputtering systems. By investigating the correlations between atomic-scale structures, electronic states, and impurity hydrogen content through X-ray diffraction and absorption techniques, it was found that hydrogen-passivated defects resulting from a specific sputtering condition can enhance TFT characteristics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Xiaoyang Dong, Jinxing Wang, Zichuan Wang, Xiyu Wang, Cong Dang, Zhicheng Wan, Yi Zou, Jingfeng Wang, Fusheng Pan
Summary: The study focused on investigating the influence of two different atomic-sized alloying elements (Gallium and Erbium) on the damping capacities of magnesium alloys, as well as the improvement in alloy performance through solid solution treatment. The research provides a foundation for the development and design of high-performance damping magnesium alloy materials.
Article
Materials Science, Multidisciplinary
Alok Singh, Takanobu Hiroto, Machiko Ode, Hiroyuki Takakura, Karel Tesar, Hidetoshi Somekawa, Toru Hara
Summary: The precipitation of a stable quasicrystalline i-phase has been observed in a Mg-6Zn-3Al magnesium alloy, which may be the first discovery of a stable i-phase in this alloy. The dissolution of i-phase at grain boundaries leads to precipitation in the Mg-matrix during cooling. Nucleation characteristics, phase transformation, and interface morphology were investigated.
Article
Materials Science, Multidisciplinary
Jiale He, Jihua Chen, Hongge Yan, Weijun Xia, Bin Su, Youping Sun, Yang Nie, Wensen Huang, Mouxin Wu
Summary: The effects of Zn/Ga ratio on the microstructure, mechanical, damping, and thermal properties of Mg-xZn-yGa alloy solid solutions have been investigated. It was found that a lower Zn/Ga ratio increases the yield strength, elongation, and strain-amplitude-dependent damping, while decreasing the strain-amplitude-independent damping and thermal conductivity. Stacking-fault energy and electro-negativity are also important factors affecting the thermal conductivity of the alloys.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Oceanography
R. Romeo, P. A. Giuliano Albo, S. Lago
Summary: This study utilized an isochoric experimental apparatus to measure the thermal properties of seawater, obtaining a relative expanded uncertainty of around 0.03% for seawater density. By fitting experimental results to a specific volume function, various thermal properties of seawater were calculated, showing a general good agreement with predictions from TEOS-10, especially in stable states.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2021)
Article
Mechanics
Cecile Monthus
Summary: In this study, large deviations at level 2.5 were applied to Markov processes with absorbing states to obtain the explicit extinction rate of metastable quasi-stationary states. This rate was determined based on the empirical time-averaged density and empirical flows over a large time-window T. The research revealed that the standard spectral problem for the slowest relaxation mode could be recovered through the optimization of the extinction rate using all these empirical observables. The study also demonstrated the derivation of large deviation properties of any time-additive observable of the Markov trajectory before extinction from the level 2.5, by decomposing the observable in terms of the empirical density and empirical flows. The general formalism described in this research has important theoretical implications and practical applications for continuous-time Markov chains and diffusion processes.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2022)
Article
Chemistry, Inorganic & Nuclear
I. S. Glazkova, M. N. Smirnova, O. N. Kondrat'eva, G. E. Nikiforova, E. S. Romanova, A. V. Sobolev, I. A. Presniakov, V. A. Ketsko
Summary: The main goal of this study is to prepare single-phase MgFe2O4 and Mg(Fe0.8Ga0.2)(2)O-4 powders using a gel auto-combustion method. Various characterization techniques, including X-ray powder diffraction (PXRD), micro-X-ray fluorescence spectrometry (mu-XRF), CHNS elemental analysis, and scanning and transmission electron microscopies (SEM and TEM), were used to analyze the morphology and chemical composition of the synthesized sample. Fe-57 Mossbauer spectroscopy measurements were conducted to evaluate the cationic distribution in the ferrites and characterize the paramagnet-ferrimagnet phase transition in MgFe2O4.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Alessio Zandona, Bernd Ruedinger, Joachim Deubener
Summary: Glass powder samples of cordierite composition, doped with 8 mol% TiO2, were heat-treated to produce a series of Mg-bearing quartz solid solutions enriched in SiO2. Rietveld structural refinements showed that Mg-bearing Qss phases have trigonal symmetry and an intermediate structural arrangement dependent on composition. High-temperature diffraction measurements revealed a reversible inversion of quartz structure at SiO2-rich compositions, occurring at lower temperatures than pure quartz. Similarities and differences to Li-bearing Qss were discussed in the text.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
J. Matthias Kahk, Georg S. Michelitsch, Reinhard J. Maurer, Karsten Reuter, Johannes Lischner
Summary: Theoretical calculations of core electron binding energies for solids have been challenging, but this work demonstrates the accurate results obtained from Delta SCF calculations. By exploiting the analogy between localized core holes and charged defects, excellent agreement between calculated and experimental data was achieved.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Mathematical
Chris Halcrow, Egor Babaev
Summary: We construct and study two kink theories, one with a controllable binding energy in a 2-kink configuration and the other with a locally stable non-topological solution called a lavi'on. These new models serve as 1D analogs for non-integrable systems in higher dimensions, such as the Skyrme model and realistic vortex systems. Furthermore, we derive a straightforward expression for the interaction energy between two kinks to aid in constructing these theories.
SYMMETRY INTEGRABILITY AND GEOMETRY-METHODS AND APPLICATIONS
(2023)
Article
Materials Science, Ceramics
B. Khongorzul, N. Jargalan, N. Tsogbadrakh, D. Odkhuu, S. V. Trukhanov, A. V. Trukhanov, D. Sangaa
Summary: Using first-principles density functional theory (DFT) calculations, this study investigated the effects of Bi substitution on the structural, electronic, and magnetic properties of barium hexaferrite. The most stable structure was found when the spin of Fe atom on specific positions was upward. The presence of Bi reduced the electronic band gap and dramatically changed the electronic structure.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Vitalii Turchenko, A. S. Bondyakov, Sergei Trukhanov, Ignasi Fina, V. V. Korovushkin, Maria Balasoiu, Silviu Polosan, Bernat Bozzo, Nicoleta Lupu, Alex Trukhanov
Summary: The microscopic mechanism of ferroelectric properties in M-type barium hexaferrites is investigated using experimental and first-principle computation methods. The correlation between thermal factors in sample annealing process and functional properties is confirmed through magnetic, X-ray, and Mossbauer measurements. The occurrence of remnant polarization in barium hexaferrites at room temperature contradicts the description of their crystal structure, suggesting a direct relationship between remnant polarization and broken spatial-inversion symmetry.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Y. Slimani, M. A. Almessiere, A. Baykal, S. E. Alsulaim, S. V. Trukhanov, D. S. Klygach, T. I. Zubar, M. G. Vakhitov, A. V. Trukhanov, R. Jermy, A. Ul-Hamid
Summary: The nanosized spinel ferrites (NSFs) of Co0.5Ni0.5ScxFe2-xO4 (x < 0.1), CoNiSc, were synthesized by sol-gel approach. The structural and phase formation were investigated using XRD, SEM, TEM, and HR-TEM, showing the formation of single-phase cubic spinel structure. The magnetic properties were strongly influenced by the introduction of Sc3+ ions. Microwave properties analysis revealed an increase in resonant frequency and amplitude with Sc substitution.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
T. A. Taha, Shahid Mehmood, Zahid Ali, ShahRukh Khan, Salma Aman, Hafiz Muhammad Tahir Farid, S. V. Trukhanov, T. I. Zubar, D. I. Tishkevich, A. V. Trukhanov
Summary: This study uses density functional theory to investigate the structural, electronic, optical, thermoelectric, and magnetic properties of A(3)In(2)As(4) and A(5)In(2)As(6) (A = Eu and Sr) Zintl phase compounds in orthorhombic phases. The results show agreement between the calculated structural properties and experimental data. The magnetic properties indicate that Sr3In2As4 and Sr5In2As6 are non-magnetic, while Eu3In2As4 and Eu5In2As6 are antiferromagnetic. Electronic properties reveal that all compounds are narrow direct bandgap semiconductors with r and M symmetry. The compounds exhibit optical dynamics in the infrared region and can be used as shields for ultraviolet radiation and in optoelectronic devices. Additionally, their low thermal conductivity, high Seebeck coefficient, and power factor suggest their potential for thermoelectric applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Shahid Mehmood, Zahid Ali, Norah Alwadai, Maryam Al Huwayz, M. S. Al-Buriahi, S. V. Trukhanov, D. I. Tishkevich, A. V. Trukhanov
Summary: DFT was used in this study to investigate the electronic band profiles of CaCu3B2Re2O12 (B = Mn, Fe, Co, and Ni), and it was found that these compounds exhibit half-metallic character. The magnetic energy curves showed type-I ferrimagnetic order in all the compounds. The Cu-B, B-Re, and Cu-Re site spins interact through the Heisenberg model, resulting in the Cu(up arrow)B(up arrow)Re(down arrow) order. The Re moments anti-align with B and Cu, leading to ferrimagnetism.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Suleman Waheed, Salma Aman, Gouadria Soumaya, Norah Salem Alsaiari, Sumaira Manzoor, T. I. Zubar, Daria I. Tishkevich, Sergei Trukhanov, M. S. Al-Buriahi, Alex Trukhanov
Summary: This study presents a Mott-Schottky catalyst encircled copper nanoparticles, including the nitrogen doped carbon layers (Cu@NC), for oxygen evolution reactions (OER) in electrochemical water splitting. The fabricated Cu@NC exhibits a lower overpotential, lower Tafel slope, and exceptional stability with extensive oxygen evolution activity. The addition of Cu and N species significantly enhances the number of active sites and improves electronic conductivity, making it promising for future applications.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Sumaira Manzoor, F. F. Alharbi, Abdullah G. Al-Sehemi, Muhammad Naeem Ashiq, Abdul Ghafoor Abid, Rabia Yasmin Khosa, Mohammad Numair Ansari, Sergei Trukhanov, Daria Tishkevich, Alex Trukhanov
Summary: Using a hydrothermal technique, researchers created a composite of cerium selenide incorporated carbon nanospheres (CeSe2@CNs) nanocomposite. The CeSe2@CNs demonstrated high electrocatalytic activity for oxygen evolution reaction (OER) in alkaline solution, with excellent stability and durability. The integration of CeSe2 nanorods into microporous hollow carbon nanospheres increased the intrinsic activity and electrocatalytic surface area.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ahmed Maher Henaish, Moustafa A. Darwish, Osama M. Hemeda, Ilya A. Weinstein, Tarek S. Soliman, Alex V. Trukhanov, Sergei V. Trukhanov, Di Zhou, Ali M. Dorgham
Summary: This study prepared PbZr0.8Ti0.2O3 lead zirconate-titanate using the tartrate precursor method and designed (Polyvinyl alcohol (PVA)/PbZr0.8Ti0.2O3 (PZT)) thin film systems using the traditional casting technique. The annealing temperature of PZT was found to affect the structural characteristics of the composite films. X-ray examination showed the presence of rhombohedral and tetragonal perovskite structures.
Article
Physics, Applied
A. Kh. Nabiyeva, S. H. Jabarov, S. V. Trukhanov, A. V. Trukhanov, N. A. Ismayilova
Summary: In this study, complex oxides La0:97Ba0:03MnO3, La0:73Ba0:27MnO3, and La0:5Ba0:5MnO3 were synthesized and their structural properties were investigated using XRD and SEM techniques. The results showed that these compounds have a perovskite structure and partial substitution of La with Ba did not disrupt the ideal structure, preserving the cubic crystal structure.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Chemistry, Physical
S. Caliskan, M. A. Almessiere, A. Baykal, H. Gungunes, Y. Slimani, M. Hassan, D. S. Klygach, V. G. Kostishin, S. V. Trukhanov, A. V. Trukhanov, M. A. Gondal
Summary: The microstructure, morphology, magnetic features, hyperfine interactions, and oxidation state and chemical composition of Co-V co-substituted nano Sr-hexaferrite were investigated. The average crystallite size of the products was found to be in the range of 37-83 nm. The hexagonal morphology and chemical composition were observed and analyzed. The magnetization, coercivity, and microwave properties of the samples were also studied.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Marwa M. Hussein, Samia A. Saafan, H. F. Abosheiasha, Di Zhou, D. S. Klygach, M. G. Vakhitov, S. V. Trukhanov, A. V. Trukhanov, T. I. Zubar, K. A. Astapovich, Hesham M. H. Zakaly, Moustafa A. Darwish
Summary: Nanosized spinel ferrites Co1-xNixFe2O4 (where x = 0.0-1.0), or CNFO, were produced via a chemical method. X-ray diffraction (XRD) was used to determine the crystal structure's characteristics. It was found that all samples had a single phase with cubic syngony (space group Fd3m). The lattice parameter and unit cell volume were found to correlate with the ionic radii and coordination numbers of Co2+ and Ni2+ ions, with an increase in Ni2+ content leading to a decrease in lattice parameter and unit cell volume.
Article
Chemistry, Multidisciplinary
Fadei F. F. Komarov, Stanislav V. V. Konstantinov, Igor V. V. Chizhov, Valery A. A. Zaikov, Tatiana I. I. Zubar, Alex V. V. Trukhanov
Summary: Spacecraft in outer space are exposed to various factors, such as electron flows, high-energy ions, solar electromagnetic radiation, plasma irradiation, and meteorite particles, which can lead to failure. To ensure reliable operation, protective coatings and radiation-resistant materials are necessary.
Article
Materials Science, Multidisciplinary
Reda E. El-Shater, Hassan El Shimy, Samia A. Saafan, Moustafa A. Darwish, Di Zhou, Kadiyala Chandra Babu Naidu, Mayeen U. Khandaker, Z. Mahmoud, Alex V. Trukhanov, Sergei V. Trukhanov, Fatma Fakhry
Summary: Manganese-doped MnxFe3-xO4 spinel ferrites with different Mn concentrations were successfully fabricated using co-precipitation. The XRD results confirmed the formation of spinel phase with well-crystallized particles and the lattice parameter increased with increasing Mn concentration. XPS data supported the presence of Mn3+ and Mn4+ in the nanosized crystallites. The samples exhibited a large specific surface area and showed potential for chemical and biological applications. Magnetic investigations revealed an enhancement in the magnetic parameters of the nanostructured samples with an increase in Mn concentration.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
F. F. Alharbi, Shahid Mehmood, Zahid Ali, Salma Aman, Rabia Yasmin Khosa, Vladimir G. Kostishyn, Sergei V. Trukhanov, M. I. Sayyed, Daria I. Tishkevich, Alex V. Trukhanov
Summary: The structural, electronic, elastic, and magnetic properties of the CeCu3-xMnxV4O12 (x = 0, 1, 2, and 3) system were investigated using DFT calculations with GGA, GGA+U, and HF potential. The results showed that the lattice parameters increased as Mn was substituted for Cu due to the larger atomic radii of Mn. CeCu3V4O12 was found to be the most thermodynamically stable compound. Substituting Mn for Cu led to the compounds becoming semi-metals and changing from non-magnetic to anti-ferromagnetic. The elastic characteristics demonstrated mechanical stability, anisotropy, and ductility in these compounds. The anti-ferromagnetic ductile nature of the Mn base compounds suggests their potential use in spintronic applications and magnetic cloaking devices.
Article
Chemistry, Multidisciplinary
H. A. Alburaih, Sumaira Manzoor, M. Abdullah, M. N. Ashiq, Salma Aman, Sergei V. Trukhanov, Tatiana I. Zubar, Zhipeng Sun, T. A. Taha, Alex V. Trukhanov
Summary: In this study, metal oxy-hydroxides with numerous oxygen defects (M-OOHv) were synthesized on the surface of Cu foam (CF) through a straightforward electro-oxidation reconstitution (ER) process. The Al2Cu-MOF@M-OOHv-ER/CF nanomaterial showed lower overpotential and higher Tafel slope, indicating enhanced OER activity. This newly developed nanomaterial has great potential for applications in water electrolysis and other energy storage devices.
