Article
Chemistry, Inorganic & Nuclear
Neetu Dhanda, Sonam Kumari, Rakesh Kumar, Dinesh Kumar, An-Cheng Aidan Sun, Preeti Thakur, Atul Thakur
Summary: Nickel-substituted cobalt ferrite nanoparticles were synthesized and characterized. The nanoparticles exhibited a cubic spinel ferrite structure and their magnetic properties were determined. With the increase in nickel doping concentration, the crystallite size and lattice parameters decreased, and the saturation magnetization, remanence magnetization, and coercivity of the nanoparticles decreased as well. These findings suggest that the prepared nanoparticles can be used for data storage device applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Nicolas Zapp, Denis Sheptyakov, Alexandra Franz, Holger Kohlmann
Summary: Substituting hydrogen for oxygen atoms in metal oxides influences the solid-state properties, and holmium hydride oxide exhibits high thermal stability and inertness towards air, with an ordered fluorite superstructure.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
D. Pukazhselvan, Ihsan Caha, Suresh Kumar Jakka, Vanessa C. D. Graca, Laura I. V. Holz, M. J. Soares, Andrei V. Kovalevsky, Francis Leonard Deepak, Duncan Paul Fagg
Summary: This study provides insights into the active catalytic species in ceria additive loaded hydrogen storage system, MgH2, through mechanical milling and cycling tests. In-situ X-ray diffraction and Raman spectroscopy studies confirm the interaction between MgH2 and CeO2, with evidence of reduced cerium oxides throughout the interactions. The CeHx/CeOx interfaces play a key role in suppressing the formation of MgO rock salt.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Ceramics
Jiang-An Liu, Chen-Hui Li, Yang Zou, An-Nan Chen, Liang Hu, Yu-Sheng Shi
Summary: The study investigated lattice distortion and grain boundary diffusion in IGZO powders during ball-milling at different speeds, revealing that faster milling speeds lead to enhanced sintering properties driven primarily by grain boundary diffusion. High-energy ball-milling process was shown to increase lattice distortion energies and shorten diffusion distances, resulting in improved sintering performances in ceramic powders.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Yuta Ito, Isao Tsuyumoto
Summary: Nanocrystalline lithium niobate, LiNbO3, is prepared through an aqueous solution process, starting from peroxo - polyniobic acid solution. The crystalline LiNbO3 has the same structure as conventional LiNbO3 with a small crystallite size. The nanocrystalline LiNbO3 prepared at 500 degrees Celsius exhibits a high ionic conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Hiromi Nakano, Shota Ando
Summary: New phosphors Li-M-Ti-O:Mn4+ were synthesized using solid state reaction. A unique superstructure was formed by the periodic insertion of an intergrowth layer into a trigonal structure matrix. The relationship between PL intensity, Mn ion oxidation, and crystal structure was clarified through X-ray diffraction, transmission electron microscopy, and X-ray absorption spectroscopy.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Soil Science
Matthew H. H. Fischel, Cathy E. Clarke, Donald L. Sparks
Summary: Manganese-oxides are strong sorbents and oxidants that occur in trace amounts in soils as coatings and crusts. The microscale mineralogy of these manganese phases in soils and concretions is not well known. This study collected soils and concretions from South Africa to determine the mineralogy. X-ray diffraction showed the dominance of lithiophorite and the presence of todorokite in less altered soils, while more altered soils were enriched in gibbsite and birnessite. Synchrotron XRF mapping provided insights into the mechanisms stabilizing manganese and iron. The mu XRD revealed a mineralogical gradient across a concretion transect, with birnessite in the outermost layer and other minerals becoming more abundant in the middle layers.
Article
Chemistry, Multidisciplinary
Shuo Feng, Rajesh Kumar Singh, Yucheng Fu, Zhuo Li, Yulong Wang, Jie Bao, Zhijie Xu, Guosheng Li, Cassidy Anderson, Lili Shi, Yuehe Lin, Peter G. Khalifah, Wei Wang, Jun Liu, Jie Xiao, Dongping Lu
Summary: In this study, a simple strategy was demonstrated for constructing low-tortuosity through-pores in both vertical and planar directions of electrodes by casting large particles into single-particle-layer electrodes. Through multi-scale characterizations and simulations, correlations between material/electrode structures, electrolyte permeability, polysulfide migration, and sulfur reactions were elucidated. The high-loading and dense sulfur cathode fabricated by this method delivers a high specific capacity at a very low electrolyte/sulfur ratio.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Jannis Thien, Jari Rodewald, Tobias Pohlmann, Kevin Ruwisch, Florian Bertram, Karsten Kuepper, Joachim Wollschlaeger
Summary: This study prepared high-quality CoxFe3-xO4 films with different Co contents using reactive molecular beam epitaxy. The epitaxy, film interfaces, and roughness were extensively investigated using time-resolved X-ray diffraction, low-energy electron diffraction, and X-ray reflectivity measurements. The composition and electronic structure of the films were characterized by hard X-ray photoelectron spectroscopy. The results provide valuable insights into the growth and properties of CoxFe3-xO4 films.
Article
Chemistry, Physical
Busra Kaya, Tuncay Karakurt, Onur Sahin, Bahri Ulkuseven
Summary: The template reaction was used to synthesize cobalt complexes with different ligand structures, which were characterized experimentally and computationally to better understand their properties.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Nanoscience & Nanotechnology
Jin-Gyu Bae, Ju-Hyeon Lee, Min Sung Kim, Byung Gon Kim, Hyeon Jeong Lee, Ji Hoon Lee
Summary: A molten salt synthesis method was used to produce sphere-like single-crystal magnesium-doped LiCoO2. The lattice strain was effectively alleviated, and the phase transition was suppressed by both the particle shape and Mg doping. The preference for Mg doping in the Co site rather than the Li site in the LCO framework was systematically revealed.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Peter Schoderboeck, Kevin Ploner
Summary: The production of molybdenum from MoO3 in industrial scale was compared with laboratory scale reduction. Different process conditions and scales resulted in kinetically controlled and thermodynamically controlled reductions. Similar intermediates were formed in both processes with different crystallographic structures, which were identified using crystallographic methods.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Physical
Yoshinari Makimura, Keita Niitani, Ippei Goto, Akira Tsujiko, Hideaki Oka, Takamasa Nonaka, Takeshi Abe
Summary: The factors affecting the reaction kinetics of spinel-related positive electrode materials for enhancing power capability and energy density were examined. The study found that single-phase reactions have smaller polarizations compared to two-phase reactions, leading to improved power capability and energy density.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Pierre-Antoine Dubos, Jamal Fajoui, Baptiste Girault, David Gloaguen
Summary: The objective of this paper is to investigate the deformation mechanisms of a rolled polycrystalline cobalt sheet, focusing on the strain-induced phase transformation and the influence of forming parameters such as plastic anisotropy and loading path. In situ phase quantification by X-ray diffraction during tensile tests on samples from different directions revealed the activation of martensitic phase transformation by basal slip, but with a delay when strained at an angle of 45 degrees to the rolling direction. Post mortem analyses confirmed the continuation of the phase transformation at higher strain levels. The coupling between strain-hardening mechanisms and phase transformation is discussed considering the plastic anisotropy of cobalt.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Seiya Shimono, Hiroki Ishibashi, Yusuke Nagayoshi, Hidekazu Ikeno, Shogo Kawaguchi, Masato Hagihala, Shuki Torii, Takashi Kamiyama, Katsuya Ichihashi, Sadafumi Nishihara, Katsuya Inoue, Yui Ishii, Yoshiki Kubota
Summary: A structural transition from a cubic phase to a tetragonal phase was observed in non-centrosymmetric oxyfluoride Co3Sb4O6F6 at around 180K. The transition was confirmed through specific heat, magnetization, and dielectric measurements, and a magnetic structure analysis revealed a transition from a paramagnetic phase to a G-type antiferromagnetic phase at around 67K.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Physics, Applied
M. H. Ehsani, S. Esmaeili, M. Aghazadeh, P. Kameli, Isa Karimzadeh
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2019)
Article
Nanoscience & Nanotechnology
Maryam Mohebbi, Alireza Allafchian, Parviz Kameli, Seyed Amirhoosien Jalali
MICRO & NANO LETTERS
(2019)
Article
Materials Science, Multidisciplinary
M. H. Ehsani, S. Esmaeili, M. Aghazadeh, P. Kameli, F. Shariatmadar Tehrani, Isa Karimzadeh
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2019)
Article
Nanoscience & Nanotechnology
Bagher Aslibeiki, Parviz Kameli, Hadi Salamati, Giorgio Concas, Maria Salvador Fernandez, Alessandro Talone, Giuseppe Muscas, Davide Peddis
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
M. Zarifi, P. Kameli, T. Raoufi, A. Ghotbi Varzaneh, D. Salazar, M. I. Nouraddini, L. Kotsedi, M. Maaza
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Materials Science, Ceramics
Ali Obeydavi, Ali Shafyei, Ahmad Rezaeian, Parviz Kameli, Jyh-Wei Lee
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2020)
Article
Materials Science, Ceramics
B. Aslibeiki, P. Kameli
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
Hadi Papi, Hossein Ahmadvand, Mohammad Torabi Shahbaz, Saeideh Mokhtari, Mohammad Khondabi, Parviz Kameli
Summary: The study investigates the magnetic, dielectric, and magnetoelectric properties of particulate composites containing BF33BT-3BZT and CFO, showing that the composites exhibit relaxor behavior and have a high ME voltage coefficient. Compared to cobalt ferrite, composite of BF33BT-3BZT with nickel ferrite produces larger ME voltage at a lower magnetic field, confirming the crucial role of magnetic field dependence of magnetostriction on the ME properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Review
Instruments & Instrumentation
Farhad Larki, Yaser Abdi, Parviz Kameli, Hadi Salamati
Summary: Graphene, as a two-dimensional material, has great potential for optoelectronic applications. However, the small optical absorption and complex fabrication processes are challenges for the wide application of pure graphene photodetectors. Optimization of growth technique, property modification, transfer technique, and design are important for fabricating full graphene photodetectors.
Article
Materials Science, Multidisciplinary
R. Zarei Moghadam, M. H. Ehsani, H. Rezagholipour Dizaji, P. Kameli, M. Jannesari
Summary: By doping with oxygen, the oxygen content of DLC films increases, while sp(2) content decreases and sp(3) content increases. The C-C bonding loses its order, and the hydrophilicity of the films also improves with the increase in oxygen content.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Physical
Ali Obeydavi, Ali Shafyei, Ahmad Rezaeian, Parviz Kameli, Jyh-Wei Lee
Summary: Novel Fe46Cr23Mo14Co7B5Si5 and Fe40Cr23Mo14Co7P6B5Si5 thin film metallic glasses were successfully deposited using direct current magnetron sputtering. Microstructural evaluations and mechanical properties tests demonstrated that the addition of P element improved the surface quality, mechanical properties, and corrosion resistance of the films. The type of substrate had minor influence on fracture toughness values, while the P addition significantly increased the polarization resistance.
Article
Materials Science, Multidisciplinary
Hossein Nikmanesh, Elnaz Jaberolansar, Parviz Kameli, Ali Ghotbi Varzaneh, Mohsen Mehrabi, Mohsen Shamsodini, Mohammad Rostami, Inaki Orue, Volodymyr Chernenko
Summary: A series of samarium-doped cobalt ferrite nanoparticles were successfully synthesized using sol-gel auto-combustion method. The saturation magnetization decreased with increasing samarium content, but showed an improvement at lower temperatures. Samarium-doped cobalt ferrite is a suitable candidate for moderate permanent magnets and high density information storage, especially at low temperatures.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
M. Zarifi, P. Kameli, A. Ghotbi Varzaneh, H. Nikmanesh, H. Ahmadvand
Summary: The relationship between anisotropic magnetoresistance (AMR) and phase separation in LPCMO/NGO films was investigated in this study. It was found that by adjusting the annealing process and target substrate distance, the crystalline orientation of the films can be modified, leading to changes in the metal insulator transition (MIT) temperature and magnetoresistance (MR).
Article
Materials Science, Multidisciplinary
M. Khojaste Khoo, P. Kameli
Summary: Strontium hexaferrite thin films prepared by pulsed-laser deposition show improved crystallization and increased coercivity after annealing, with the highest coercivity of approximately 11 kOe measured on an Al2O3 substrate.
FRONTIERS IN MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
A. Ghotbi Varzaneh, P. Kameli, I. Abdolhosseini Sarsari, M. Ghorbani Zavareh, C. Salazar Mejia, T. Amiri, Y. Skourski, J. L. Luo, T. H. Etsell, V. A. Chernenko
