A5007600477- Metal and Thin Film Mechanics
- Magnetic properties of thin films
- Heusler alloys: electronic and magnetic properties
- Advanced materials and composites
- ZnO doping and properties
- Diamond and Carbon-based Materials Research
- Microstructure and mechanical properties
- Magnetic Properties and Applications
- Lubricants and Their Additives
- MXene and MAX Phase Materials
- Tribology and Wear Analysis
- Aluminum Alloys Composites Properties
- Chalcogenide Semiconductor Thin Films
- Fusion materials and technologies
- Perovskite Materials and Applications
- 2D Materials and Applications
- Electronic Packaging and Soldering Technologies
- Surface and Thin Film Phenomena
- Quantum Dots Synthesis And Properties
- Shape Memory Alloy Transformations
- Adhesion, Friction, and Surface Interactions
- Ferroelectric and Negative Capacitance Devices
- Conducting polymers and applications
- Electromagnetic wave absorption materials
- Intermetallics and Advanced Alloy Properties
University of Portsmouth
2023-2024
University of Southampton
2019-2023
University of York
2014-2021
Bielefeld University
2017
As a platinum group metal, iridium (Ir) is the scarcest element on earth but it has been widely used as an antiferromagnetic layer in magnetic recording, crucibles and spark plugs due to its high melting point. In layers have pin neighbouring ferromagnetic spin-valve read head hard disk drive for example. Recently, also found induce spin-polarised electrical current. these devices, most commonly antiferromagnet Ir–Mn alloy because of corrosion resistance reliable pinning adjacent layers. It...
Crystalline formation of high magnetic-moment thin films through low-temperature annealing processes compatible with current semiconductor technologies is crucial for the development next generation devices, which can utilise spin degree freedom. Utilising in-situ aberration corrected electron microscopy, we report a 235 °C crystallisation process Co-based ternary Heusler-alloy film whose initial nucleation initiated by as few 27 unit cells. The occurs preferentially in ⟨111⟩ crystalline...
Transition metal dichalcogenide (TMD)-based coatings are known for their low friction performance, which is attributed to the formation of a tribolayer consisting almost exclusively pure well-ordered TMD. However, such and its wear track coverage still unknown. In this study, we employed surface mapping nanotribological techniques study properties tracks composite W-S-C coatings. Our analysis revealed that as-deposited coating consisted two phases, with significantly different nanoscale...
Ni2MnAl Heusler alloy thin films were epitaxially grown on MgO(1 0 0) single crystal substrates by ultra-high-vacuum magnetron sputtering technique. X-ray diffraction and transmission electron microscopy observation revealed that the structures of all B2-ordered regardless deposition temperature ranging from room to 600 °C. The dependence electrical resistivity showed a kink about 280 K, which was consistent with reported value Néel for antiferromagnetic B2-Ni2MnAl. magnetization curves...
This mini-review article explores the evolution of wireless communication technologies, emphasizing crucial role played by advancements in information transfer over long distances with minimal errors. Tracing developments from submergible cables to current 5G technology, review discusses potential 6G, offering insights into transformative applications it could enable, such as holographic real-time and autonomous transport infrastructure. Exploring Terahertz (THz) frequencies, presents...
Abstract The application of magnetic oxides in spintronics has recently attracted much attention. epitaxial growth oxide on Si could be the first step new functional devices with semiconductors. However, spinel ferrite films are generally grown substrates, not To combine and semiconductor technology, we fabricated Fe 3 O 4 through a Si(111) substrate by inserting γ-Al 2 buffer layer. Both layer grew epitaxially exhibited electronic properties as same bulk. Furthermore, also found dependence...
In this paper, we report our new optical method for the measurement of bandgaps half-metallic ferromagnets (HMFs) that are sensitive to both surface/interface and bulk regions these depending on light incident angles resulting penetration depth. We measured bandgap polycrystalline Co <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> FeSi Heusler alloy thin films at room temperature (RT) as an example. The were deposited MgO(001) Si/SiO...
Achieving the theoretical strength of a metallic alloy material is demanding task that usually requires utilizing one or more well-established routes: (1) Decreasing grain size to stop slow down dislocation mobility, (2) adding external barriers pathways, (3) altering crystal structure, (4) combining two previous discrete strategies, is, implementing seeds into an amorphous matrix. Each outlined methods has clear limitations; hence, further improvements are required. We present unique...
The ideal electron transport layer of a high performance perovskite solar cell should have good optical transparency, mobility, and an energy level alignment well-matched with the material. In this work, we investigate role TiCl4 post-treatment mesoporous TiO2 by varying concentration characterizing electrical properties, charge carrier dynamics, photovoltaic mesoscopic CH3NH3PbI3 cells. It is found that treatment provides additional interconnection between particles, leading to better...
We report on the integration of an antiferromagnetic Heusler compound acting as a pinning layer into magnetic tunneling junctions (MTJs). The antiferromagnet Ru2MnGe is used to pin magnetization direction ferromagnetic Fe in MgO based thin film magnetoresistance stacks. samples were prepared using magnetron co-sputtering. investigate structural properties by X-ray diffraction and reflection, well atomic force high-resolution transmission electron microscopy. find excellent crystal growth...
We investigated growth, annealing conditions and magnetic properties of the Heusler alloy Fe2+xVyAl by means x-ray diffraction, hysteresis exchange-bias measurements. Ferromagnetic films were obtained sputtering Fe2VAl Fe3VAl targets performing post-growth annealing. The characteristic (2 2 0) peaks seen in diffraction measurements corresponding ferromagnetic behaviours observed. In addition, antiferromagnetic deposited employing Al pegs on targets. had elemental ratios close to predicted...
Nanocrystalline W100-xAlx (x up to 20 at.%) powders obtained by mechanical alloying have been consolidated spark plasma sintering (SPS). Alloying W with Al significantly improves the sinterability, allowing fabrication of dense samples. The consolidation process keeps nanocrystalline microstructure substantially unaffected, which contributes hardness final W-Al alloys. room-temperature nano- and micro-hardness W80Al20 alloy sintered at 1100 °C are as high 18 14 GPa, respectively. These...
Recent rapid advancement in antiferromagnetic spintronics paves a new path for efficient computing with THz operation. To date, major studies have been performed conventional metallic, e.g., Ir-Mn and Pt-Mn, semiconducting, CuMnAs, antiferromagnets, which may suffer from their elemental criticality high resistivity. In order to resolve these obstacles, films are under intense development device operation above room temperature. Here, we report the structural magnetic properties of an Ni2MnAl...