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Now showing items 1111-1120 of 2111
Direct measurement of exchange as a function of separation for discrete donor-acceptor pairs in ZnSe
(American Physical Society, 1988)
We describe optical detection of magnetic resonance for 17 well-resolved discrete zinc interstitial donor-zinc vacancy acceptor pairs of varying separation in ZnSe. For most of the pairs, microwave transitions are detected ...
A "combination nova" outburst in Z Andromedae: nuclear shell burning triggered by a disk instability
(American Astronomical Society, 2006)
We describe observational evidence for a new kind of interacting binary star outburst that involves both an accretion instability and an increase in thermonuclear shell burning on the surface of an accreting white dwarf. ...
Properties of lightweight fibrous materials made using a foam-forming technique
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
This thesis concerns the production and characterisation of foam-formed fibrous materials made from wood, peat fibres and spent grain. Such materials might find commercial applications for insulating purposes when produced ...
Magnetization and Temperature Dependence of the Mossbauer Spectrum Shift for an Insulator.
(American Physical Society, 1969)
The results of a Mossbauer-effect study of HoFeO3 in the temperature range 99-875?K are presented. Special attention is paid to the shift of the center of the spectrum and its temperature dependence both above and below ...
Magnetic moment investigations of epitaxial magnetite thin films
(AMERICAN INSTITUTE OF PHYSICS, 2008)
In this report, we provide an x-ray magnetic circular dichroism (XMCD) study for 100?nm thick epitaxial magnetite (Fe3O4) films on MgO (001) and Al2O3 (0001) substrates. For XMCD, we recorded the surface sensitive total ...
Giant tunneling magnetoresistance with electron beam evaporated MgO barrier and CoFeB electrodes
(2010)
Electron-beam (EB) evaporated MgO grows with (001) texture on amorphous CoFeB when the deposition rate is kept below 5 pm/s. Magnetic tunnel junctions (MTJs) fabricated using this method exhibit similar to 240% magnetoresistance ...
Polarisation dependence of two-photon absorption generated by band-limited amplified spontaneous emission noise in silicon avalanche photodiodes
(2011)
Two-photon absorption (TPA) generated by unpolarised band-limited amplified spontaneous emission (BL-ASE) noise is found to be within 5% of that generated by circularly polarised BL-ASE noise for silicon-based devices. A ...
First-principles study of spontaneous polarization in multiferroic BiFeO3
(American Physical Society, 2005)
The ground-state structural and electronic properties of ferroelectric BiFeO3 are calculated using density functional theory within the local spin-density approximation (LSDA) and the LSDA + U method. The crystal structure ...
Spin transport properties of single metallocene molecules attached to single-walled carbon nanotubes via nickel adatoms
(2011)
The spin-dependent transportproperties of single ferrocene, cobaltocene, and nickelocene molecules attached to the sidewall of a (4,4) armchair single-walled carbon nanotube via a Ni adatom are investigated by using a ...