Article
Materials Science, Multidisciplinary
G. Venturini, B. Malaman, G. Le Caer, T. Mazet
Summary: The study on Stannides TmMn6-xFexSn6 reveals different magnetic structures and hyperfine magnetic field properties due to variations in composition, showcasing a complex interplay of magnetic phases and interactions between transition metal atoms and tin sites.
Article
Materials Science, Multidisciplinary
Dinesh Kumar Pati, S. Bhattacharjee, M. Mahapatra, B. N. Parida, Piyush R. Das, R. Padhee
Summary: In this study, a detailed investigation of the multifunctional properties of calcium strontium titanate substituted lead iron niobate ceramic oxide was reported. The compound exhibited a pseudocubic structure and presence of tensile strain, as well as photocatalytic activity and weak ferromagnetism and ferroelectricity.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
Varsha C. Pujari, Pramod D. Mhase, Rohini M. Mahindrakar, Sher Singh Meena, Sanjay R. Kamble, Sunil M. Patange, Santosh S. Jadhav
Summary: Different Nd doping concentrations of Ba-Ca hexaferrites were synthesized using sol-gel auto-ignition method. The results showed that Nd doping modulated the magnetic behavior of the hexaferrites, resulting in moderate saturation magnetization and high coercivity values.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
I Unzueta, J. Lopez-Garcia, V Sanchez-Alarcos, V Recarte, J. Perez-Landazabal, J. A. Rodriguez-Velamazan, J. S. Garitaonandia, J. A. Garcia, F. Plazaola
Summary: The influence of Co addition and internal stress on atomic level magnetism in Ni-Mn-Sn alloys was studied. Results showed that the singlet component could be tracked under a wider range of conditions, with conclusions drawn regarding the transfer of dipolar field and the sensitivity of Sn Mossbauer probe atoms to slight microstructural distortions.
Article
Multidisciplinary Sciences
Farshad Nejadsattari, Zbigniew M. Stadnik
Summary: The electronic, magnetic and hyperfine-interaction properties of the 112-type iron-pnictide compound EuFeAs2 have been investigated using density-functional theory. The band structure is similar to other 112-type compounds, originating mainly from Fe atoms, with a mixture of ionic and covalent bonding predicted. There is good agreement between calculated hyperfine-interaction parameters and experimental results.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Ehab A. Okba, Fatma E. Fakhry, Hany H. El-Bahnasawy, Mohamed M. Abdel-Galeil, Reda E. El Shater
Summary: The photodegradation of sunset yellow dye was efficiently achieved using Ag-Doped Cd-Cu Spinel Nanoferrite as a photocatalyst. The method is economically feasible, environmentally sustainable, scalable, and does not require toxic solvents or surfactants. The prepared nanoparticles have large specific surface areas and show potential applications in chemistry and biology.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Maximilian Kai Reimann, Aylin Koldemir, Theresa Block, Jutta Koesters, Frank Tappe, Rainer Poettgen
Summary: The stannide BaRhSn2 was synthesized by melting the precursor compound RhSn2 with barium in a sealed tantalum ampoule. The structure of BaRhSn2 was refined and found to have a two-dimensional [RhSn2] polyanionic network, with short Rh-Sn and Sn-Sn distances. The presence of large barium atoms caused distortion in the tin substructure, leading to a break in the Sn-Sn bond. This change is reflected in the Sn-119 Mossbauer spectrum, which shows a higher s electron density compared to the previously reported stannide CaRhSn2.
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
(2023)
Article
Physics, Applied
K. S. Kantharaj, G. V. Jagadeesha Gowda, N. Ramprasad, A. T. Kozakov, A. Nikolsky, Stass Kubrin, Arjuna K. Gowda, A. El-Denglawey, Jagadeesha Angadi
Summary: In this study, the electronic structural microstructure and spectroscopic characteristics of LuFeO3 were investigated using X-ray diffraction, X-ray photoelectron spectroscopy, and Mössbauer spectroscopy. The morphology and size of the particles were found to be highly dependent on the reaction temperature, synthesis method, and fuel.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Chemistry, Multidisciplinary
Katarzyna Bednarska-Szczepaniak, Katarzyna Dziedzic-Kocurek, Ewelina Przelazly, Jan Stanek, Zbigniew J. Lesnikowski
Summary: Mossbauer spectroscopy of iron(III) bis(dicarbollide) and its adduct revealed low spin Fe-III in the former and surprisingly Fe-II in the latter. In the adduct, numerical simulations showed a gradient of electric charge, which may explain the Fe-II-like character observed.
CHEMICAL COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Yongtao Li, Xinran Sun, Fanping Meng, Shuo Xu, Chuhan Wu, Enyuan Qi, Xuejian Zhang, Dexin Huang, Huisheng Liu, Zong yan Dong, C. K. Mahadevan
Summary: KCl0.5Br0.5:0.01Ce(3+),XPr3+ (X=0.002, 0.004, 0.006, 0.008, 0.01, 0.02 and 0.04) crystals were grown using the Czochralski method and their structural, optical and mechanical properties were investigated. Ce and Pr ions were found to have entered the crystal matrix and created vacancies. UV-Vis absorption spectra showed peaks at different wavelengths. PL emission spectra demonstrated an increase in peak emission with increasing Pr ion concentration, reaching a maximum at X=0.006. Energy transfer between Ce(3+) and Pr3+ ions was studied. Micro-hardness measurements indicated an increase in elastic stiffness constant and Vickers hardness values with increasing Pr ion concentration.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Biochemistry & Molecular Biology
Rita Reale, Giovanni Battista Andreozzi, Maria Pia Sammartino, Anna Maria Salvi
Summary: This study compares the iron stains on archeological marbles with those artificially produced on Carrara marbles and Travertine samples. Through integrated techniques such as optical and scanning electron microscopy, as well as Mossbauer and XPS spectroscopy, the mechanisms of rust formation and diffusion in carbonates were revealed, along with the identification of phases such as ferrihydrite, goethite, maghemite, nanomagnetite, and hematite.
Article
Geochemistry & Geophysics
Mariola Kadziolka-Gawel, Jacek Nowak, Magdalena Szubka, Joanna Klimontko, Marcin Wojtyniak
Summary: This study investigates the mineralogical alteration of siderite samples annealed at various temperatures and in different atmospheres. The decomposition process of siderite is affected by temperature and atmosphere conditions, with the lowest iron and highest magnesium content sample exhibiting a higher temperature for decomposition. The main products of siderite decomposition include magnetite, hematite, maghemite, wustite, and olivine, depending on the annealing temperature and atmosphere.
Article
Chemistry, Physical
George Charitou, Charalambos Tsertos, Yiannis Parpottas, Soteroula Christou, Carsten W. Lederer, Marios Phylactides, Marina Kleanthous
Summary: Fe-57 Mossbauer Spectroscopy revealed significant amounts of ferritin-like iron in red blood cells from thalassaemia patients, especially in those with intermediate thalassaemia. Intermediate thalassaemia patients were found to have higher Liver Iron Concentration compared to major thalassaemia patients despite lower serum ferritin levels on average.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Review
Chemistry, Physical
Yuri Mikhlin, Maxim Likhatski, Roman Borisov, Denis Karpov, Sergey Vorobyev
Summary: This article introduces a family of layered materials inspired by minerals, investigates their composition and structure, and discusses their potential multifunctional applications.
Article
Chemistry, Physical
I. S. Lyubutin, N. Snegirev, M. A. Chuev, S. S. Starchikov, E. S. Smirnova, M. Lyubutina, S. Yagupov, M. B. Strugatsky, O. A. Alekseeva
Summary: In this study, Mossbauer spectroscopy and X-ray diffraction were used to investigate the crystal structure and hyperfine interaction parameters of FeBO3 single crystals over a wide temperature range. A theoretical model was developed to describe nuclear resonance transitions in iron atoms, and a technique for correcting Mossbauer spectra was elaborated. The results showed significant effects of additional resonance lines on the FeBO3 spectra, and the study is crucial for the application of FeBO3 crystals in high-tech fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
O. M. Shumelyuk, A. Yu. Volkov, Ya. M. Skrypka, L. E. Halliburton, N. C. Giles, C. A. Lenyk, S. A. Basun, A. A. Grabar, Yu. M. Vysochansky, S. G. Odoulov, D. R. Evans
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Chemistry, Physical
E. M. Scherrer, N. C. Giles, T. E. R. Dodson, A. A. Grabar, D. R. Evans, S. A. Basun, J. E. Slagle, L. E. Halliburton
JOURNAL OF CHEMICAL PHYSICS
(2020)
Article
Physics, Applied
I. Zamaraite, V. Liubachko, R. Yevych, A. Oleaga, A. Salazar, A. Dziaugys, J. Banys, Yu. Vysochanskii
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Physics, Applied
T. D. Gustafson, E. M. Golden, E. M. Scherrer, N. C. Giles, A. A. Grabar, S. A. Basun, D. R. Evans, J. E. Slagle, L. E. Halliburton
Summary: Electron paramagnetic resonance (EPR) is used to study photoinduced changes in the charge states of sulfur vacancies and Cu ions in tin hypothiodiphosphate. The research found that at low temperatures, exposure to light causes the transfer of electrons from Cu+ ions to sulfur vacancies to form Cu2+, while at high temperatures the sulfur vacancies release electrons back to Cu2+ ions.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
A. Kohutych, V Liubachko, V Hryts, Yu Shiposh, M. Kundria, M. Medulych, K. Glukhov, R. Yevych, Yu Vysochanskii
Summary: The temperature dependence of longitudinal hypersound velocity in CuInP2S6 ferrielectrics was investigated using Brillouin spectroscopy. It was found that the acoustic phonon branch exhibits pronounced softening in the paraelectric phase below T* (approximately 330K) and cooling to the first order phase transition temperature T-c (approximately 312K) into the ferrielectric phase. The softening is induced by the flexoelectric coupling of relaxational soft polar optical and acoustic branches, which is related to an inhomogeneously polarized state appearing between the paraelectric and ferrielectric phases. The anomalous thermal conductivity of the CuInP2S6 crystal near the ferrielectric transition also demonstrates a decrease in the group velocity of heat transferring phonons with cooling from T* to T-c.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2022)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Yulian M. Vysochanskii, Viktoria V. Khist, Dean R. Evans
Summary: Using the Landau-Ginzburg-Devonshire approach, the study investigates screening-induced phase transitions in core-shell ferroic nanoparticles of three different shapes: an oblate disk, a sphere, and a prolate needle. The results demonstrate that the screening length of the shell has a critical influence on the phase transitions and spontaneous polarization of the nanoparticle core. The tunable screening shell allows the control of the polar state and phase diagrams, which can be of great significance for nonvolatile memory cells.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Applied
V. Liubachko, A. Oleaga, A. Salazar, A. Kohutych, A. Pogodin, Yu. Vysochanskii
Summary: The temperature anomalies of heat capacity and entropy in CuInP2S6 layered crystal at ferrielectric ordering can be explained by theoretical studies, which predict the appearance of a critical endpoint and a bicritical endpoint on the phase diagram. Therefore, the splitting of the heat capacity anomaly in Ag0.1Cu0.9InP2S6 mixed crystal can be interpreted as a transformation of the ferrielectric first-order phase transition observed in CuInP2S6 into a sequent paraelectric-ferrielectric second-order phase transition and an isostructural first-order transition with a sharp change of polarization in the ferrielectric phase.
LOW TEMPERATURE PHYSICS
(2023)
Article
Physics, Applied
Anna N. Morozovska, Eugene A. Eliseev, Mykola E. Yelisieiev, Yulian M. Vysochanskii, Dean R. Evans
Summary: Using the Landau-Ginzburg-Devonshire approach, the stress-induced transformations of polarization switching in CuInP2S6 nanoparticles of different shapes were studied. The semiconducting properties of the nanoparticles were modeled using a surface-charge layer with a small effective screening length due to the field effect. The results showed a strong and unusual influence of hydrostatic pressure on polarization switching, hysteresis loop shape, magnitude of remanent polarization, and coercive fields.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Ayana Ghosh, Mykola E. Yelisieiev, Yulian M. Vysochanskii, Sergei V. Kalinin
Summary: In this study, the strain-induced polarization reversal in a ferroelectric CuInP2S6 (CIPS) thin film with conductive electrodes is explored. The study reveals an unusually strong effect of mismatch strain on the out-of-plane polarization reversal, hysteresis loop shape, dielectric susceptibility, and piezoelectric response of CIPS films.
Article
Physics, Condensed Matter
V. Pashchenko, O. Bludov, D. Baltrunas, K. Mazeika, S. Motria, K. Glukhov, Yu. Vysochanskii
Summary: The experimental studies of the paramagnetic-antiferromagnetic phase transition in the layered Cu0.15Fe0.85PS3 crystal are presented, utilizing Mossbauer spectroscopy and measurements of temperature and field dependencies of magnetic susceptibility. The observed peculiar behavior at low temperatures indicates weak ferromagnetism in the studied alloy. Ab initio simulations of the electronic and spin subsystems reveal the peculiarities of spin ordering at low temperatures and changes in interatomic interactions near the Cu substitutional atoms.
CONDENSED MATTER PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Sergei Kalinin, Yulian M. Vysochanskii, Petro Maksymovych
Summary: By using the Landau-Devonshire approach and experimental results, a multiwell thermodynamic potential for the layered ferroelectric material CuInP2S6 (CIPS) was constructed, revealing the important role of nonlinear electrostriction in the material. The study calculated temperature and pressure phase diagrams and spontaneous polarization of bulk CIPS, as well as strain-induced phase transitions in thin films and stress-induced phase transitions in nanoparticles. The results also showed the significant influence of mismatch strain, elastic stress, and shape anisotropy on the phase diagrams and polar properties of nanoscale CIPS, with analytical expressions allowing for elastic control of polar properties.
Article
Physics, Multidisciplinary
Nacera Bouldja, Alexander Grabar, Marc Sciamanna, Delphine Wolfersberger
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Kyle Kelley, Yulian M. Vysochanskii, Sergei Kalinin, Petro Maksymovych
Article
Materials Science, Multidisciplinary
Vasyl Shvalya, Janez Zavasnik, Venera Nasretdinova, Hana Ursic, Janez Kovac, Alexander Grabar, Anton Kohutych, Alexander Molnar, Dean R. Evans, Dragan D. Mihailovic, Uros Cvelbar
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
V Liubachko, A. Oleaga, A. Salazar, R. Yevych, A. Kohutych, Yu Vysochanskii
