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Now showing items 223-242 of 483

  • Macroscopic ordering of polystyrene carboxylate-modified nanospheres self-assembled at the water-air interface 

    Sirotkin, Evgeny; Apweiler, Julius D.; Ogrin, Feodor Y. (American Chemical Society, 2010)
    We present results from an experimental study of ordering characteristics in monolayers of polystyrene nanospheres self-assembled at a water-air interface. We demonstrate that the interaction of spheres, governed by the ...
  • Magnesium in the atmosphere of the planet HD 209458 b: Observations of the thermosphere-exosphere transition region 

    Vidal-Madjar, A.; Huitson, Catherine M.; Bourrier, V.; Desert, J.-M.; Ballester, G.; Lecavelier des Etangs, A.; Sing, David K.; Ehrenreich, D.; Ferlet, R.; Hebrard, G.; McConnell, J.C. (EDP Sciences for European Southern Observatory (ESO), 2013)
    The planet HD 209458 b is one of the most well studied hot-Jupiter exoplanets. The upper atmosphere of this planet has been observed through ultraviolet/optical transit observations with H i observation of the exosphere ...
  • Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in a young Sun-like star 

    Lanza, A. F.; Pagano, I.; Leto, G.; Messina, S.; Aigrain, Suzanne; Alonso, R.; Auvergne, M.; Baglin, A.; Barge, P.; Bonomo, A. S.; Boumier, P.; Collier Cameron, A.; Comparato, M.; Cutispoto, G.; De Medeiros, J. R.; Foing, B.; Kaiser, A.; Moutou, C.; Parihar, P. S.; Silva-Valio, A.; Weiss, W. W. (EDP Sciences, 2009)
    Context. The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoTExo-2a) that can be considered as a good proxy for the Sun at an age of approximately 0.5 ...
  • Magnetic Braking Formulation for Sun-like Stars: Dependence on Dipole Field Strength and Rotation Rate 

    Matt, Sean P.; MacGregor, Keith B.; Pinsonneault, Marc H.; Greene, Thomas P. (American Astronomical Society / IoP Publishing, 2012)
    We use two-dimensional axisymmetric magnetohydrodynamic simulations to compute steady-state solutions for solar-like stellar winds from rotating stars with dipolar magnetic fields. Our parameter study includes 50 simulations ...
  • Magnetic Cycles in a Convective Dynamo Simulation of a Young Solar-type Star 

    Brown, Benjamin P.; Miesch, Mark S.; Browning, Matthew K.; Brun, Allan Sacha; Toomre, Juri (American Astronomical Society / IOP Publishing, 2011)
    Young solar-type stars rotate rapidly and many are magnetically active. Some appear to undergo magnetic cycles similar to the 22 yr solar activity cycle. We conduct simulations of dynamo action in rapidly rotating suns ...
  • Magnetic imaging by x-ray holography using extended references 

    Duckworth, Thomas A.; Ogrin, Feodor Y.; Dhesi, Sarnjeet S.; Langridge, Sean; Whiteside, Amy; Moore, Thomas; Beutier, Guillaume; van der Laan, Gerrit (Optical Society of America, 2011)
    We demonstrate magnetic lensless imaging by Fourier transform holography using extended references. A narrow slit milled through an opaque gold mask is used as a holographic reference and magnetic contrast is obtained by ...
  • Magnetic processes in astrophysics: theory, simulations, experiments 

    Browning, Matthew K. (Taylor & Francis, 2014-10-21)
    Book Review Magnetic processes in astrophysics: theory, simulations, experiments, by Gunther Rudiger, Rainer Hollerbach, and Leonid L. Kitchatinov, Wiley-VCH Verlag GmbH & Co. KGaA, Boschstr. 12, 69469 Weinheim, Germany, ...
  • Magnetic second harmonic generation at the Co2MnSi/AlO x interface 

    Shelford, L.R.; Liu, Y.; Hicken, R.J.; Sakuraba, Y.; Oogane, M.; Ando, Y. (American Institute of Physics, 2008)
    We have studied magnetic second harmonic generation (MSHG) at the Co2MnSi/AlOx interface. The variation of the MSHG intensity was consistent with the nonvanishing components of the nonlinear susceptibility tensor expected ...
  • Magnetization reversal processes in epitaxial Fe/GaAs(001) films 

    Daboo, C.; Hicken, R.J.; Eley, D.E.P.; Gester, M.; Gray, S.J.; Ives, A.J.R.; Bland, J.A.C. (American Institute of Physics, 1994)
    In this article we present the results of a detailed study of the switching behavior observed in epitaxial single Fe films of thickness between 30 and 450 Å, and a wedge shaped Fe film with a thickness range of 10–60 Å ...
  • Magnetometry of low-dimensional electron and hole systems 

    Usher, Alan; Elliott, Martin (Institute of Physics, 2009)
    The high-magnetic-field, low-temperature magnetic properties of low-dimensional electron and hole systems reveal a wealth of fundamental information. Quantum oscillations of the thermodynamic equilibrium magnetization yield ...
  • Magnonic beam splitter: The building block of parallel magnonic circuitry 

    Sadovnikov, A.V.; Davies, C.S.; Grishin, S.V.; Kruglyak, V.V.; Romanenko, D.V.; Sharaevskii, Yu. P.; Nikitov, S.A. (American Institute of Physics (AIP), 2015-05-13)
    We demonstrate a magnonic beam splitter that works by inter-converting magnetostatic surface and backward-volume spin waves propagating in orthogonal sections of a T-shaped yttrium iron garnet structure. The inter-conversion ...
  • Making Tunnel Barriers (Including Metals) Transparent 

    Hooper, Ian R.; Preist, T. W.; Sambles, J. Roy (American Physical Society, 2006)
    The classical "brick wall," which may, according to quantum mechanics, leak via tunneling, is here shown to be completely transparent when appropriate impedance matching media are placed both in front of and behind the ...
  • The Mass-Dependence of Angular Momentum Evolution in Sun-Like Stars 

    Matt, Sean P.; Brun, Allan Sacha; Baraffe, I.; Bouvier, Jerome; Chabrier, G. (American Astronomical Society, 2015)
    To better understand the observed distributions of rotation rate and magnetic activity of sun-like and low-mass stars, we derive a physically motivated scaling for the dependence of the stellar-wind torque on Rossby number. ...
  • Massively sub-wavelength guiding of electromagnetic waves 

    Hooper, Ian R.; Tremain, B.; Dockrey, J.A.; Hibbins, Alastair P. (Nature Publishing Group, 2014)
    Recently a new form of ultra-thin flexible waveguide consisting of a conducting comb-like structure with a thickness of the order of 1/600(th) of the operating wavelength was presented. However, whilst the thickness of the ...
  • A maximum-likelihood method for fitting colour-magnitude diagrams 

    Naylor, Tim; Jeffries, R.D. (Oxford University Press for Royal Astronomical Society, 2006)
    We present a maximum-likelihood method for fitting two-dimensional model distributions to stellar data in colour–magnitude space. This allows one to include (for example) binary stars in an isochronal population. The method ...
  • Measurement of hot electron momentum relaxation times in metals by femtosecond ellipsometry 

    Kruglyak, V.V.; Hicken, R.J.; Ali, M.; Hickey, B.J.; Pym, A.T.G.; Tanner, B.K. (American Physical Society, 2005)
    Time-resolved ellipsometric measurements were made upon Au, Cu, Ag, Ni, Pd, Ti, Zr, and Hf thin films. Using an elliptically polarized pump beam, the decay of the optically induced polarization of the sample was observed. ...
  • Measuring and modelling optical scattering and the colour quality of white pierid butterfly scales 

    Luke, S. M.; Vukusic, Peter; Hallam, B. T. (Optical Society of America, 2009)
    Colouration in butterfly wings is due to the interaction of light with a covering of scales on both wing surfaces. A combination of nanostructure in the scales, which reflect or scatter light, and absorption from chemical ...
  • Mechanisms of THz generation from silver nanoparticle and nanohole arrays illuminated by 100 fs pulses of infrared light 

    Polyushkin, Dmitry K.; Marton, I.; Racz, P.; Dombi, P.; Hendry, Euan; Barnes, William L. (American Physical Society, 2014)
    We study THz pulses generated from plasmonic metal nanostructures under femtosecond illumination of near-IR light. We find two regimes of excitation, according to the order of the dependence of the THz fluence on the ...
  • Metamaterial tunnel barrier gives broad band microwave transmission 

    Butler, Celia A.M.; Hooper, Ian R.; Hibbins, Alastair P.; Sambles, J. Roy (American Institute of Physics, 2011)
    A simple structure comprising a metal mesh, symmetrically surrounded by subwavelength thickness dielectric layers, is shown to give near total microwave transmission over a broad frequency range. The mesh may be considered ...
  • Microwave liquid-crystal variable phase grating 

    Yang, Fuzi; Sambles, J. Roy (American Institute of Physics, 2004)
    A voltage-controlled variable phase grating, at microwave frequencies, is described and its response characterized. It comprises a stack of 71 aluminium strips of 1 mm thickness separated by 75 µm spaces, filled with ...