Browsing by Subject "Thin films"
Now showing items 1-20 of 33
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Anomalous magnetization reversal due to proximity effect of antiphase boundaries
(2011)Here we report anomalous double switching hysteresis loop and high coercivity (~0.1 T) in Fe3O4(110) thin films. Our analytical model based on spin chains confined within small antiphase boundary domains (APBDs) suggests ... -
Bending stability of Cu0.4CrO2 - A transparent p-type conducting oxide for large area flexible electronics
(2018)The current best performing p-type transparent conducting oxides are typically highly crystalline materials, deposited at high temperatures, and hence incompatible with the drive to low cost flexible electronics. We ... -
Composition and strain in thin Si1-xGex virtual substrates measured by micro-Raman spectroscopy and X-ray diffraction
(2011)Micro-Raman spectroscopy was employed for the determination of the germanium content, x and strain, , in ultrathin SiGe virtual substrates grown directly on Si by molecular beam epitaxy. The growth of highly relaxed ... -
Controlling the resistive switching hysteresis in VO2 thin films via application of pulsed voltage
(2020)We investigate the origin of the variation in resistive switching hysteresis of VO2 thin films. Using pulsed electrical measurements in textured VO2 thin film devices, we show that the hysteresis observed in I–V curves ... -
Copper silver thin films with metastable miscibility for oxygen reduction electrocatalysis in alkaline electrolytes
(2018)Increasing the activity of Ag-based catalysts for the oxygen reduction reaction (ORR) is important for improving the performance and economic outlook of alkaline-based fuel cell and metal–air battery technologies. In this ... -
Deformation and Yield of Polymer Thin Films in Confined Geometries
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)Polymer thin film mechanics represents a hugely promising field of research. Due to their versatility and ease of fabrication, polymer films and coatings rank among the most ubiquitous systems in all of nanotechnology. The ... -
Effect of sample bias on backscattered ion spectroscopy in the helium ion microscope
(2010)The authors present experimental results showing the effect of an applied bias voltage on backscattered ion spectra acquired from thin films of ruthenium and hafnia in the helium ion microscope. A characteristic peak ... -
First-principles study of the influence of (110)-oriented strain on the ferroelectric properties of rutile TiO2
(American Physical Society, 2011)We use first-principles density-functional theory to investigate the softening of polar phonon modes in rutile TiO(2) under tensile (110)-oriented strain. We show that the system becomes unstable against a ferroelectric ... -
The goldilocks electrolyte: examining the performance of iron/nickel oxide thin films as catalysts for electrochemical water splitting in various aqueous NaOH solutions
(2016)A rigorous study of electrodeposited pure and mixed Ni/Fe oxides was performed in three different sodium hydroxide electrolytes with various Fe impurity concentrations (<1 ppb, 5 ppb and 102 ppb). The presence and concentration ... -
Growth and characterization of epitaxial Ti3GeC2 thin films on 4 H-SiC(0 0 0 1)
(2012)Epitaxial Ti3GeC2 thin films were deposited on 4? off-cut 4 H-SiC(0 0 0 1) using magnetron sputtering from high purity Ti, C, and Ge targets. Scanning electron microscopy and helium ion microscopy show that the Ti3GeC2 ... -
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 ... -
Growth of n-type ?-CuCl with improved carrier concentration by pulsed dc sputtering: Structural, electronic and UV emission properties
(2011)? Copper (I) chloride is naturally a direct band gap, zincblende and p-type semiconductor material with much potential in linear and non-linear optical applications owing to its large free excitonic binding energy. In order ... -
Highly Efficient One-Dimensional Triplet Exciton Transport in a Palladium-Porphyrin-Based Surface-Anchored Metal-Organic Framework
(2019)Efficient photon harvesting materials require easy-to-deposit materials exhibiting good absorption and excited-state transport properties. We demonstrate an organic thin-film material system, a palladium-porphyrin based ... -
Large Reversible Plasmon Shift with Au Nanodisc Dimers on Thin film VO2
(2022)By coupling Au dimer nanostructures to an underlying thin film of phase change material, vanadium dioxide, significant shifts in the plasmonic scattering spectra are observed, allowing for dynamic tuning within the visible ... -
Laser-induced failure modes in plasmonic thin films
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)In order for the areal density of magnetic hard-drives to continue increasing, it is necessary to improve upon current recording technologies. The proposed next-generation magnetic recording process, heat-assisted magnetic ... -
Magnetic order and magnetotransport in half-metallic ferrimagnetic MnyRuxGa thin films
(2021)The ruthenium content of half-metallic Mn2RuxGa thin films, with a biaxially strained inverse Heusler structure, controls the ferrimagnetism that determines their magnetic and electronic properties. An extensive study of ... -
Magnetic properties of the Co/Alq(3) interface
(2011)A method is described for measuring the magnetic integrity of ferromagnetic/organic interfaces that involves measuring the magnetic moment per unit area of bilayers with different ferromagnet thicknesses. The method is ... -
Magnetization and anisotropy of cobalt ferrite thin films
(2017)The magnetization of thin films of cobalt ferrite frequently falls far below the bulk value of 455kAm−1, which corresponds to an inverse cation distribution in the spinel structure with a significant orbital moment of about ... -
Magnetoelectric behaviour of ferrimagnetic BixCo2-xMnO4 (x=0, 0.1 and 0.3) thin films
(Elsevier, 2011)Thin films of BixCo2-xMnO4 (x=0, 0.1 and 0.3) were grown on quartz, LaAlO3 (LAO) and YBa2Cu3O7 (YBCO) buffer layer coated-LAO substrates by pulsed laser deposition (PLD). X-ray diffraction (XRD) and Raman scattering ... -
Manipulation of Vanadium Oxide Characteristics for Applications: Resistive switching & Reflectance Anisotropy Spectroscopy
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)This thesis deals with the study of vanadium dioxide, vanadium pentoxide and the mixed 4+ and 5+ valence vanadium oxide phases, or Wadsley phases. Thin films (VO2) and single crystals (V2O5) are examined. Vanadium dioxide ...