Browsing Physics (Scholarly Publications) by Title
Now showing items 1080-1099 of 1694
-
Observation of a new interference phenomena in internal conical diffraction
(2015)Conical diffraction is observed in biaxial materials when a beam of light is directed along one of the two optic axis directions. When the beam is directed close to but not along an optic axis, a rich interference pattern ... -
Observation of antiferromagnetic coupling in epitaxial ferrite films
(2006)Defects in ferrite can change the local magnetic coupling from ferromagnetic to strongly antiferromagnetic. In eptiaxial magnetite (Fe3O4) films, defects locally altering exchange interaction, i.e., ?antiphase boundaries? ... -
Observation of intermultiplet transitions in Sm(Fe11Ti) by inelastic neutron scattering
(American Physical Society, 1990)Magnetic neutron spectroscopy of SMFe11Ti reveals a dispersionless electronic excitation corresponding to transitions between levels of the exchange-split ground- and first-excited-state multiplets of the Sm3+ ion. The ... -
Observation of magnetic domains using a reflection-mode scanning near-field optical microscope
(American Institute of Physics, 1997)It is demonstrated that it is possible to image magnetic domains with a resolution of better than 60 nm with the Kerr effect in a reflection-mode scanning near-field optical microscope. Images taken of tracks of ... -
Observation of nonradiative energy transfer in the excitation of Nd3+ in GaP
(American Physical Society, 1990)We have carried out luminescence-excitation measurements on a Nd3+ complex in GaP in the range 1.5?2.2 eV to determine the mechanisms by which the internal Nd3+ luminescence is generated. At low temperatures we observe ... -
An observational overview of solar flares
(2011)We present an overview of solar flares and associated phenomena,drawing upon a wide range of observational data primarily from the RHESSI era. Following an introductory discussion and overview of the status of observational ... -
Observations of a variety of drainage patterns in bamboo foams
(EDP Sciences, 2008)We have explored the patterns of drainage in a bamboo foam, i.e. a foam consisting of an arrangement of parallel soap films with equidistant spacing. We find an intriguing variety of such patterns, both static and dynamic. ... -
Observations of Low Frequency Solar Radio Bursts from the Rosse Solar-Terrestrial Observatory
(2012)The Rosse Solar-Terrestrial Observatory (RSTO; www.rosseobservatory.ie) was established at Birr Castle, Co. Offaly, Ireland (53?05'38.9'', 7?55'12.7'') in 2010 to study solar radio bursts and the response of the Earth?s ... -
Off-resonance surface plasmon enhanced spontaneous emission from CdTe quantum dots
(2006)Surface plasmon (SP) enhanced photoluminescence (PL) from CdTe quantum dots (QDs) on monolayers of Au nanoparticles is investigated under both resonant and nonresonant conditions. Enhancement of the QD PL intensity is ... -
On the 3-D reconstruction of Coronal Mass Ejections using coronagraph data
(Copernicus Publications, 2010)Coronal Mass ejections (CMEs) are enormous eruptions of magnetized plasma expelled from the Sun into the interplanetary space, over the course of hours to days. They can create major disturbances in the interplanetary ... -
On the conservation of the angular momentum in ultrafast spin dynamics
(2021)The total angular momentum of a close system is a conserved quantity, which should remain constant in time for any excitation experiment once the pumping signal has extinguished. Such conservation, however, is never satisfied ... -
On the effects of stellar winds on the magnetospheres and potential habitability of exoplanets
(2014)Context: The principle definition of habitability for exoplanets is whether they can sustain liquid water on their surfaces, i.e. that they orbit within the habitable zone. However, the planet's magnetosphere should also ... -
On the relationship between income, fertility rates and the state of democracy in society
(2016)Empirical data for 145 countries shows a strong correlation between the gross national income per capita and the political form of their governance, as specified by the so-called democracy index. We interpret this relationship ... -
On the relationship between morphology and conductivity in nanosheet networks
(2021)It is well-known that the morphology of nanostructured networks is closely linked to network properties. However, controlling and characterizing the morphology of networks of 2D nanosheets has not been explored. In this ... -
On the relationship between morphology and conductivity in nanosheet networks
(2021)It is well-known that the morphology of nanostructured networks is closely linked to network properties. However, controlling and characterizing the morphology of networks of 2D nanosheets has not been explored. In this ... -
On the Road Again: Metal Foams Find Favor
(American Institute of Physics, 2002)The three states of matter are well represented by earth, sea, and sky. God saw that it was good, and so did many generations of physics lecturers. But purity is obscurity, as Ogden Nash reminded us. The rich variety of ... -
Onset of rigidity for stretched string networks
(Institute of Physics, 2005)We define and analyse an elementary model for a network of strings with random natural lengths. As this system is expanded, a threshold is reached where some of the strings form a taut string network. Further expansion ... -
Optical and magnetic-circular-dichroism-optically-detected-magnetic-resonance study of the Co2+ ion in LiGa5O8
(American Physical Society, 1992)Optical and magnetic-circular-dichroism?optically-detected-magnetic-resonance studies have been carried out on Co-doped LiGa5O8. The Co ions are found to be predominantly in the 2+ charge state and to substitute for ... -
Optical and phonon excitations of modified Pandey chains at the Si(111)-2×1 surface
(2011)The modified Pandey π-bonded chain structure for the (2×1) reconstruction of the Si(111) surface has two nearly degenerate structures in which one or the other of two atoms in the π chain is the outermost atom at the ...
