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Now showing items 11-20 of 25
Preparation And Characterization Of Hard Magnetic Nanoparticles
(Physics, 2007-08-23)
Hard-magnetic nanoparticles with uniform size distribution have attracted huge attention in the past several years because of their unique magnetic properties and potential for many applications such as high density recording ...
On The Existence And Stability Of Carbon -based Silicon Fullerenes -a Density Functional Theoretic Study
(Physics, 2007-08-23)
The electronic and geometric properties of silicon-carbon fullerene-like nanostructures with two, four, six, twenty and twenty four carbon atoms on the surface of the Si60 cages by substitution, as well as inside the cage ...
First Observation Of Dijet Events With An Antiproton Tag At [square root]s = 1.96 TEV Using The DØ Forward Proton Detector
(Physics, 2007-08-23)
The Forward Proton Detector (FPD) is a new sub-system of the DØ detector, a 5000 ton particle physics detector located at the Fermilab Tevatron proton-antiproton collider. The FPD was implemented for the Tevatron Run II ...
Quartic: An Ultra-fast Time-of-flight Counter
(Physics, 2007-09-17)
Fast time-of-flight counters are planned to dramatically decrease backgrounds to events with a massive central system and forward/backward protons at the LHC. By using timing to confirm that the protons originated from the ...
First Direct Measurement Of The Energy Spectra Of Individual Auger Cascade Steps In Solid MnO, Ag And Pd
(Physics, 2007-09-17)
We present the first direct measurements of energy spectra of electrons emitted in the later steps of the Auger cascade processes in solids. Measurements were carried out for the L-->MV-->VVV and L-->MM-->MVV-->VVVV Auger ...
Study Of Oxide Surfaces Using Time Of Flight Positron Annihilation Induced Auger Electron Spectroscopy
(Physics, 2007-08-23)
Transition metal oxides (TMOs) exhibit a rich collection of interesting and intriguing properties which can be used for wide variety of applications. In this dissertation, I will discuss the first PAES measurements on ...
Holographic Patterning Of Polymer Dispersed Liquid Crystal Materials For Diffractive Optical Elements
(Physics, 2007-08-23)
Liquid crystals are a soft condensed matter phase that share properties with both isotropic liquids and crystalline solids. Composite materials formed from both low molecular weight liquid crystals and polymers are of both ...
Bulk FePt/Fe3Pt nanocomposite magnets prepared by spark plasma sintering
(American Institute of Physics, 2007-04-27)
FePt/Fe3Pt bulk nanocomposite magnets have been prepared by the spark plasma sintering of chemically synthesized FePt and Fe3O4 nanoparticles under 100 MPa at 400–600 °C. It was found that the phase transition of the FePt ...
Temperature- and magnetic-field-induced phase transitions in Fe-rich FePt alloys
(American Institute of Physics, 2007-06-01)
Structural and magnetic properties of the FexPt100-x (x=78–88) alloys have been investigated. It is found that for all of the investigated compositions, a phase transition occurs from the disordered γ phase to the ordered ...
Structural phase transition and ferromagnetism in monodisperse 3 nm FePt particles
(American Institute of Physics, 2007-08-30)
FePt nanoparticles with a size of 3 nm and thermally stable room-temperature ferromagnetism are investigated. The monodisperse nanoparticles were prepared by chemical synthesis and a salt-matrix annealing technique. ...