mohamed.mohamed4

Dr. Mohammed Hammad Mohammed Fawey

Lecturer - Lecturer

Faculty of science

Address: Physics Department - Faculty of Science - Sohag University, Sohag, Egypt

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Mohammed H. Fawey is a doctor in Physics Department (Faculty of Science) in Solid-state Physics. He got his PhD degree from the Technical University of Darmstadt (TU Darmstadt), Germany in 2017. His main research interests are in the field of renewable energy (Fluoride Ion Batteries) and plasma applications.

Amorphous nickel nanophases inducing ferromagnetism in equiatomic Ni-Ti alloy

2018-09-26 09:32:26 | Keywords Molecular dynamics, Magnetic, Atom probe tomography, Amorphous nickel,
Amorphous nickel nanophases inducing ferromagnetism in equiatomic Ni-Ti alloy
Ni50Ti50 nm-sized amorphous particles are prepared using inert-gas condensation followed by in situ compaction. Elemental segregation of Ni and Ti is observed in the consolidated nanostructured material Amorphous, nearly pure Nickel (96%) nanophases form within the amorphous Ni50Ti50 alloy. Combining atom probe tomography and scanning transmission electron microscopy with computer modelling, we explore the formation process of such amorphous nanophase ... Read more

Tailoring of surface plasmon resonances in TiN/(Al0.72Sc0.28)N multilayers by dielectric layer thickness variation

2018-09-26 09:46:25 | Keywords Plasmon resonance, TEM,
Tailoring of surface plasmon resonances in TiN/(Al0.72Sc0.28)N multilayers by dielectric layer thickness variation
Alternative designs of plasmonic metamaterials for applications in solar energyharvesting devices are necessary due to pure noble metal-based nanostructures’ incompatibility with CMOS technology, limited thermal and chemical stability, and high losses in the visible spectrum. In the present study, we demonstrate the design of a material based on a multilayer architecture with systematically varying dielectric interlayer thicknesses that result in ... Read more

Void-mediated coherency-strain relaxation and impediment of cubic-to-hexagonal transformation in epitaxial metastable metal/semiconductor TiN/Al0.72Sc0.28N multilayers

2018-09-26 10:34:46 | Keywords Multilayer Films, Hardness, TEM,
Void-mediated coherency-strain relaxation and impediment of cubic-to-hexagonal transformation in epitaxial metastable metal/semiconductor TiN/Al0.72Sc0.28N multilayers
Bulk metastable phases can be stabilized during thin-film growth by employing substrates with similar crystal structure and lattice parameter, albeit over a thickness range limited by coherency-strain relaxation. Expanding that strategy, growth of superlattices comprising one stable and another metastable compound with similar crystal structure and lattice parameters are known to yield epitaxial stabilization over a few nanometers of thickness. ... Read more

Compensation of native donor doping in ScN: Carrier concentration control and p-type ScN

2018-09-26 10:50:25 | Keywords TEM,
Compensation of native donor doping in ScN: Carrier concentration control and p-type ScN
Scandium nitride (ScN) is an emerging indirect bandgap rocksalt semiconductor that has attracted significant attention in recent years for its potential applications in thermoelectric energy conversion devices, as a semiconducting component in epitaxial metal/semiconductor superlattices and as a substrate material for high quality GaN growth. Due to the presence of oxygen impurities and native defects such as nitrogen vacancies, sputter-deposited ... Read more

Conductivity Optimization of Tysonite-type La1-xBaxF3- x Solid Electrolytes for Advanced Fluoride Ion Battery

2018-09-26 11:08:51 | Keywords Fluoride Ion Battery, Impedance spectroscopy, Solid electroyte, Tysonite, Energy storage,
Conductivity Optimization of Tysonite-type La1-xBaxF3- x Solid Electrolytes for Advanced Fluoride Ion Battery
Lithium ion battery is currently the method of choice when it comes to local stationary storage of electrical energy. In the search for an alternative system, fluoride ion battery (FIB) emerges as a candidate due to its high theoretical capacity, and no lithium is needed for its operation. To improve the cycling performance and lower the working temperature of a ... Read more

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