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Browsing 02 Physical Sciences by Title

Now showing items 331-350 of 622

Long wavelength behavior of the fundamental mode in microstructured optical fibers

Wilcox Stuart; Botten Lindsay; De Sterke C; Kuhlmey Boris; Mcphedran Ross; Fussell David; Tomljenovic-Hanic Snjezana (Optical Society of America, 2005)

Using a novel computational method, the fundamental mode in index-guided microstructured optical fibers with genuinely infinite cladding is studied. It is shown that this mode has no cut-off, although its area grows ...
Low-energy electron-beam irradiation and yellow luminescence in activated Mg-doped GaN

Klein Hn; Phillips Matthew; Gelhausen Olaf; Goldys Ewa (American Institute of Physics, 2003)

The effect of low-energy electron-beam irradiation (LEEBI) on native defects and residual impurities in metalorganic-vapor-phase-epitaxy-grown, lightly Mg-doped, p-type GaN was studied by temperature-resolved and excitation ...
Low frequency corrections to the static effective dielectric constant of a two-dimensional composite material

Mcphedran Ross; Poulton Christopher; Nicorovici Nicolae; Movchan Alexander (Royal Society, 1996)
Low interfact reflection of rod-type phonic crystals: a bottom up approach

De Sterke C; White Tom; Botten Lindsay; Mcphedran Ross (SPIE, 2006)
Low switching threshold using nonlinearities in stopbandtapered waveguide Bragg gratings

Maitra Ayan; Poulton Christopher; Wang Jin; Leuthold Juerg; Freude Wolfgang (IEEE Publications, 2005)

We numerically study the nonlinear switching characteristics in a waveguide grating with a linearly tapered stopband. This type of design shows promising results in decreasing the threshold switching power, while ...
The LU-LC conjecture is false

Ji Zhengfeng; Chen Jianxin; Wei Zhaohui; Ying Mingsheng (Rinton Press, 2010)

The LU-LC conjecture is an important open problem concerning the structure of entanglement of states described in the stabilizer formalism. It states that two local unitary equivalent stabilizer states are also local ...
Luminescent properties of ZnO structures grown with a vapour transport method

Foley Matthew; Ton-That Cuong; Phillips Matthew (Elsevier Inc, 2010)

ZnO structures were synthesised on the sapphire (112 ¿ 0) substrate by a vapour transport method in a gas !owing furnace. The in!uence of the oxygen content in the gas mixture on the morphology and luminescent properties ...
Magnetic-field-induced enhancement of terahertz emission from III-V semiconductor surfaces

Johnston Michael; Corchia A; Dowd Annette; Linfield Edmund; Davies A.; Mclaughlin Robert; Arnone Don; Pepper Michael (Elsevier, 2002)

We discuss the origins of the magnetic-field-induced enhancement of terahertz (THz) emission from bulk semiconductor surfaces. The principal effect of the magnetic field is to rotate the THz dipole and hence dramatically ...
Magnetic fields in barred galaxies - III. The southern peculiar galaxy NGC 2442

Harnett, J. I.; Ehle, M.; Fletcher, A.; Beck, R.; Haynes, R. F.; Ryder, S.; Thierbach, M.; Wielebinski, R. (EDP Sciences, 2004)

Observations of the southern peculiar galaxy NGC 2442 with the Australia Telescope Compact Array in total and linearly polarized radio continuum at -l6 em are presented and compared with previously obtained Hrr data. The ...
Magnetic Fields in Barred Galaxies. I. The Atlas

Ehle, M.; Shoutenkov, V.; Thierbach, M.; Harnett, J. I.; Haynes, R. F.; Sokoloff, D. D.; Beck, R.; Shukurov, A. (EDP Sciences, 2002)
Magneto-optical imaging of the magnetization process in colossal magnetoresisitive lanthanum manganite

Polyanskii A; Wang Xiu-Hong; Yao Qw; Dou Shi; Lin Zhi Wei (Jack); Zhu Jianguo (American Institute of Physics, 2006)

To gain insight into the origin of the colossal reduction of resistance in response to magnetic field in colossal magnetoresistance manganite, the magnetic field induced transition in ferromagnetic La0.7Ca0.3MnO3 was ...
Magnetoresistance, Critical Current Density, And Magnetic Flux Pinning Mechanism In Nickel Doped Bafe(2)As(2) Single Crystals

Shahbazi M; Wang Xiu-Hong; Lin Zhi Wei (Jack); Zhu Jianguo; Dou Shi; Choi Kyung-Sook (Amer Inst Physics, 2011)

The critical current density, J(c), flux pinning behavior and magneto-resistance results of BaFe(2-x)Ni(x)As(2) single crystal have been investigated in fields up to 13 T over a temperature range of 2 to 20 K. The ...
Majorization In Quantum Adiabatic Algorithms

Wei Z; Ying Mingsheng (American Physical Soc, 2006)

The majorization theory has been applied to analyze the mathematical structure of quantum algorithms. An empirical conclusion by numerical simulations obtained in the previous literature indicates that step-by-step ...
Measurement and modeling of core losses of soft magnetic composites under 3-D magnetic excitations in rotating motors

Zhu Jianguo; Lin Zhi Wei (Jack); Guo Youguang; Zhong Jin Jiang (Institute of Electrical and Electronics Engineers, 2005)

Soft magnetic composite (SMC) materials are especially suitable for construction of low-cost high-performance motors with three-dimensional (3-D) magnetic fields. The 3-D finite-element analysis (FEA) conducted in the ...
Measurement And Modeling Of Thermal Effects On Magnetic Hysteresis Of Soft Ferrites

Lu Hai Yan; Zhu Jianguo; Hui S (Institute of Electrical and Electronics Engineers, 2007)

We present experimental measurement of thermal effects on magnetic hysteresis of soft ferrite cores commonly used in high-frequency inductors and transformers and propose a method to model the thermal effects. We measured ...
Measurement and modelling of magnetic properties of soft magnetic composite material under 2D vector magnetisations

Guo Youguang; Zhu Jianguo; Zhong Jin Jiang (Elsevier Science, 2006)

This paper reports the measurement and modelling of magnetic properties of SOMALOYTM 500, a soft magnetic composite (SMC) material, under different 2D vector magnetisations, such as alternating along one direction, ...
Measurement of magnetic properties under 3-D magnetic excitations

Zhong Jin Jiang; Lin Zhi Wei (Jack); Zhu Jianguo; Sievert Johannes (Institute of Electrical and Electronics Engineers, 2003)

In a magnetic material, even under an alternating or a two-dimensional rotating magnetic excitation, the magnetic flux is three dimensional (3-D) due to the rotation of magnetic domains. For measurement of 3-D magnetic ...
Measurement uncertainty as a threshold concept in Physics

Wilson Anna; Akerlind Gerlese; Francis Paul; Kirkup Leslie; Mckenzie Jo; Pearce Darren; Sharma Manju (Uniserve Science, 2010)

We report on the initial findings of a study aimed at developing ways to address threshold concepts in the design of undergraduate curricula, involving academics in two disciplines (physics and law) from four Australian ...
Mechanisms of enhancement of light emission in nanostructures of IiVi compounds doped with manganese

Yatsunenko S; Godlewski Marek; Ivanov V Yu; Drozdowicz-Tomasia K; Goldys Ewa; Phillips Matthew; Klar Peter; Heimbrodt Wolfram (American Institute of physics, 2007)
Melting in small gold clusters: a density functional molecular dynamics study

Soule De Bas Benjamin; Ford Michael; Cortie Michael (Institute of Physics Publishing, 2006)

Molecular dynamics simulations of the thermal behaviour of gold clusters containing 7, 13 and 20 atoms have been performed. Total energies and forces at each step of the simulation are calculated from first principles ...

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