School of Physics: Recent submissions
Now showing items 201-220 of 2200
-
Metallic Nitride and Carbide Perovskites: History and Prospects
(2022)Energy-level diagrams for cubic metallic Fe4N and Mn4N were proposed by Goodenough in the late 1960s. Fe4N is ferromagnetic, but Mn4N is ferrimagnetic with a large moment on Mnc at the cube corner site and a much smaller ... -
Stability of Mn2RuxGa-based Multilayer Stacks, Gwenaël Atcheson, Katarzyna Siewierska, J. M. D. Coey, Karsten Rode, Plamen Stamenov
(2022)Perpendicular heterostructures based on a ferrimagnetic Mn2RuxGa (MRG) layer and a ferromagnetic Co/Pt multilayer were examined to understand the effects of different spacer layers (V, Mo, Hf, HfOx and TiN) on the interfaces ... -
Single-pulse all-optical switching in amorphous DyxCo1-x and TbxCo1-x
(2022)Repeated uniform switching of the magnetization of thin films of ferrimagnetic amorphous Gdx(FeCo)1−x in response to single fast laser pulses is well established. Here, we report unusual toggle switching in thin films of ... -
The growth of high-crystalline quality M n 2 Au (110) thin films
(2022)Mn2Au is a bimetallic antiferromagnetic with an extraordinarily high Néel temperature of 1600 K. Mn2Au has also been found to demonstrate Néel-order spin–orbit torque, allowing for electrical switching of the antiferromagnetic ... -
New Methods of Studying Young Stellar Objects Using Radio Interferometry
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)While most studies of star formation are based on infrared or optical observations, radio astronomy has also proven very useful in the study of this process. This is seen for example in the detection of free-free emission ... -
Controlling the Properties of a-ZTO and a-IGZO via Low Temperature Annealing and Novel Layered Structures
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)This thesis deals with the broader implications of amorphous ZnSnO (a-ZTO) growth via two synthesis methods, examining the in-situ resistivity monitoring approach to optimising a low-annealing temperature <300 ?C and ... -
Buckling of a tilted line of confined hard spheres
(2022)A linear chain of hard spheres confined in a transverse harmonic potential is unstable and buckles, if tilted beyond some critical angle. We examine this symmetry breaking using a computational model that was previously ... -
Study of Kerr Soliton Microcombs in Optical Microresonators
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Microresonator-based Kerr optical frequency combs exhibit a spectrum of discrete and equally spaced frequency lines. The comb source is a precise frequency ruler to measure time and distance to extraordinary precision and ... -
Tunable plasmonics with Au nanoparticles coupled to thin film vanadium dioxide
(2022)The development of active devices featuring dynamic tunable plasmonic resonances is vital for wide implementation in many optoelectronic devices. By coupling plasmonic nanoparticles to an underlying thin film of phase ... -
Electrically Driven Reprogrammable Vanadium Dioxide Metasurface Using Binary Control for Broadband Beam Steering
(2022)Resonant optical phased arrays are a promising way to reach fully reconfigurable metasurfaces in the optical and near-infrared (NIR) regimes with low energy consumption, low footprint, and high reliability. Continuously ... -
Electronic transport studies of highly-polarized compensated ferrimagnetic thin films: Mn2RuxGa
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Abstract Modern day information technologies not only rely on miniaturization and densification of data processing and data storage, but also on fast data transmitters and receivers. Current CMOS based technologies are ... -
Association of perceptions of artificial light-at-night, light-emitting device usage and environmental noise
(2022)Exposure to artificial light-at-night (ALAN) is increasing globally, and there are concerns around how ALAN may impact sleep, psychological and physical health. However, there is a lack of evidence in the literature on how ... -
Developing a Next Generation Readout System for Microwave Kinetic Inductance Detectors
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Microwave Kinetic Inductance Detectors (MKIDs) are photon detectors based on superconducting resonators, capable of detecting single photons with inherent energy resolution and μs time resolution, while also allowing ... -
Liquid Processing of Interfacially Grown Iron-Oxide Flowers into 2D-Platelets Yields Lithium-Ion Battery Anodes with Capacities of Twice the Theoretical Value
(2022)Iron oxide (Fe2O3) is an abundant and potentially low-cost material for fabricating lithium-ion battery anodes. Here, the growth of α-Fe2O3 nano-flowers at an electrified liquid–liquid interface is demonstrated. Sonication ... -
Liquid-Phase Exfoliation of Nonlayered Non-Van-Der-Waals Crystals into Nanoplatelets
(2023)For nearly 15 years, researchers have been using liquid-phase exfoliation (LPE) to produce 2D nanosheets from layered crystals. This has yielded multiple 2D materials in a solution-processable form whose utility has been ... -
Compositional and Structural Characterisation of Polymer Photovoltaic Devices
Organic materials have enormous relevance in material science and have many advantages over materials such as metals, ceramics and glass due to their physical and mechanical properties. They offer a viable alternative to ... -
Modelling, development and characterisation of Microwave Kinetic Inductance Detectors for optical astronomy
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)In this thesis I report on the research I carried out on the topic of Microwave Kinetic Inductance Detectors (MKIDs) over the last four years. After an introduction chapter and a literature review on MKIDs, Chapter 3 ... -
Magnetic investigations of Mn-based and Mn-free potential half metals
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)This thesis is concerned with an unusual category of magnetically ordered material, the zero moments ferrimagnetic half metal, which has potential for applications in thin film memory and logic devices. The materials are ... -
Magnetic field effects on water and aqueous solutions
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Claims of magnetic field effects on water and their potential use in a microfluidic channel are explored. The pendant drop method is used to measure the surface tension, which is calculated from the shape of the drop. The ... -
Thermal and Athermal Characterisation of Slotted Semiconductor Lasers
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Over the past few decades, the world has experienced a revolution in information and communications technologies that has affected almost every aspect of modern life. The growth in internet capabilities and services has ...
