Browsing Physics (Scholarly Publications) by Title
Now showing items 237-256 of 1691
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Controllable growth of metallic nano-helices at room temperature conditions
(2014)We report on a method to produce multiple-pitch, regularly shaped, aligned, and freestanding metallic nano-helices at room temperature. This method overcomes the limitations of the standard glancing angle deposition approach ... -
Controlled fabrication of nickel perpendicular nanocontacts using focused ion beam milling
(American Institute of Physics, 2006)A method for the controlled fabrication of a nickel perpendicular nanocontact with diameters less than 5 nm is reported. The method involves milling pores through the 100 nm thick silicon nitride membrane using a focused ... -
Controlled in situ growth of tunable plasmonic self-assembled nanoparticle arrays
(2012)Self-assembled silver nanoparticle (NP) arrays were produced by deposition at glancing angles on transparent stepped Al2O3 templates. The evolution of the plasmonic resonances has been monitored using reflection anisotropy ... -
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 ... -
Convective instability in foam drainage
(EDP Sciences, 1998)The use of a column of steadily drained foam as a sample of wet foam is limited by flow instability as the liquid fraction is increased. We report a study of this instability, which takes the form of a convective roll ... -
Conventional and inverse magnetocaloric effects in La(0.45)Sr(0.55)MnO(3) nanoparticles
(2011)The magnetocaloric effect of La(0.45)Sr(0.55)MnO(3) nanoparticles was studied by dc magnetization measurements. A sample with mean particle size of about 140 nm exhibits both a conventional magnetocaloric effect around the ... -
Cooling-field dependence of exchange bias effect in La 0.45Sr0.55MnO3 nanoparticles
(2014)Magnetic properties of 16 nm La0.45Sr0.55MnO3 nanoparticles exhibit superparamagnetic blocking at 160 K with a ferromagnetic moment appearing in the antiferromagnetic state. The exchange interaction at the interface between ... -
Coronal Mass Ejection Detection using Wavelets, Curvelets and Ridgelets: Applications for Space Weather Monitoring
(2011)Coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic field that can produce adverse space weather at Earth and other locations in the Heliosphere. Due to the intrinsic multiscale nature of features ... -
Coronal mass ejection mass, energy, and force estimates using STEREO
(2012)Understanding coronal mass ejection (CME) energetics and dynamics has been a long-standing problem, and although previous observational estimates have been made, such studies have been hindered by large uncertainties in ... -
Correcting for probe wandering by precession path segmentation
(2023)Precession electron diffraction has in the past few decades become a powerful technique for structure solving, strain analysis, and orientation mapping, to name a few. One of the benefits of precessing the electron beam, ... -
Correlation between perpendicular exchange bias and magnetic anisotropy in IrMn/[Co/Pt](n) and [Pt/Co](n)/IrMn multilayers
(American Institute of Physics, 2005)Perpendicular exchange bias has been observed for IrMn/[Co/Pt]n and [Pt/Co]n/IrMn multilayers in the as-deposited state. The exchange bias field is largest when the IrMn film is grown on magnetically saturated Co/Pt ... -
Correlation effects in p-electron magnets: the case of RbO_2
(2009)We present results of GGA+U calculations for the "d^0 magnet" RbO_2, where magnetic properties are due to partially filled oxygen p orbitals. We show that on-site interactions on the oxygen sites lead to a strong tendency ... -
Cost & Capability Compromises in STEM Instrumentation for Low-Voltage Imaging
(2022)When characterising beam-sensitive materials in the scanning transmission electron microscope (STEM), low- dose techniques are essential for the reliable observation of samples in their true state. A simple route to minimise ... -
CoTaZr/Pd multilayer with perpendicular magnetic anisotropy
(AIP Publishing, 2013)We report a novel perpendicularly magnetized thin film [Co91.5 Ta 4.5Zr4/Pd]5 multilayer, which exhibits strong perpendicular magnetic anisotropy when grown on 5 nm of Pd and Ru seed layers. The Pd-seeded multilayer annealed ... -
Coulomb Calligraphy
(2023)The equilibrium configurations of N Coulomb charges confined by a harmonic potential in two dimensions are found to exhibit a wide variety of patterns that are pleasing to the eye, when adjacent points are joined up. We ... -
Coupled cavity modes in photonic molecules with semiconductor nanocrystals
(2005)We present a detailed study of the localized coupled-cavity modes in a photonic molecule formed from two dielectric spherical microcavities with CdTe nanocrystals, which show a multi-peak narrowband modal structure resulting ... -
Covalently functionalized hexagonal boron nitride nanosheets by nitrene addition
(Wiley, 2012)Exfoliated h-BN nanosheets were covalently functionalized via a one-step nitrene addition using azide precursor molecules. Functionalized h-BN nanosheets were found to exhibit markedly enhanced dispersability relative to ... -
The creation and annihilation of optical vortices using cascade conical diffraction
(2011)Internal conical diffraction produces a superposition of orthogonally polarised zero- and first-order Bessel like beams from an incident circularly polarised Gaussian beam. For right-circularly polarised light, the first-order ...