Browsing M.Sc. Physics by Title
Now showing items 5473 of 91

On the anharmonic, multiphonon, DebyeWaller contributions to the phononlimited resistivity of metals : applications to Na and K
(Brock University, 19790709)The anharmonic, multiphonon (MP), and OebyeWaller factor (OW) contributions to the phonon limited resistivity (;0) of metals derived by Shukla and Muller (1979) by the doubletime temperature dependent Green function ... 
On the equation of state and atomic mean square displacement of crystals
(Brock University, 19890709)We have presented a Green's function method for the calculation of the atomic mean square displacement (MSD) for an anharmonic Hamil toni an . This method effectively sums a whole class of anharmonic contributions to ... 
On the formulation and the calculation of the harmonic contributions to the DebyeWaller factor in metals (sodium)
(Brock University, 19790709)The algebraic expressions for the anharmonic contributions to the DebyeWaller factor up to 0(A ) and 0 L% ) £ where ^ is the scattering wavevector] have been derived in a form suitable for cubic metals with small ion ... 
On the path integral formulation and the evaluation of quantum statistical averages
(Brock University, 19790709)Four problems of physical interest have been solved in this thesis using the path integral formalism. Using the trigonometric expansion method of Burton and de Borde (1955), we found the kernel for two interacting one ... 
Optical properties of organic superconductor K(BETS)2FeBr4 /
(Brock University, 20070604)/c(BETS)2FeBr4 is the first antiferromagnetic organic superconductor with successive antiferromagnetic and superconducting transitions at Ta^=2.5K and Tc=l.lK respectively at ambient pressure. Polarized reflectance ... 
Optical properties of organic superconductor K(BETS)2FeBr4 /
(Brock University, 20070609)K(BETS)2FeBr4 is a quasi2D charge transfer organic metal with interesting electronic and magnetic properties. It undergoes a transition to an antiferromagnetic (AF) state at ambient pressure at the Neel temperature ... 
Optical Properties of Sb2Te3, and Dilute Magnetic Semiconductors Sb1.97 VO.03 Te3 and Sb1.94 CrO.06 Te3
(20130409)This thesis reports on the optical properties of the dilute magnetic semiconductors, Sb1.97 V 0.03 Te3 and Sb1.94Cr0.06Te3, along with the parent compound Sb2Te3' These materials develop a ferromagnetic state at low ... 
Optimization of the valence energy variance of the CuH molecule
(Brock University, 19920709)We developed the concept of split't to deal with the large molecules (in terms of the number of electrons and nuclear charge Z). This naturally leads to partitioning the local energy into components due to each ... 
Order and membrane organization in chlorhexidinelipid mixtures /
(Brock University, 20070604)Formulations of a general bactericidal agent, chlorhexidine, mixed with a phospholipid at different concentrations are investigated using ^H NMR spectroscopy on a chaindeuterated lipid analog. Lipidchlorhexidine ... 
Phonon dispersion curves and atomic mean square displacement for several fcc and bcc materials
(Brock University, 19950709)The atomic mean square displacement (MSD) and the phonon dispersion curves (PDC's) of a number of facecentred cubic (fcc) and bodycentred cubic (bcc) materials have been calclllated from the quasiharmonic (QH) theory, ... 
Phonon spectra and temperature variation of thermodynamic properties of fcc metals via FinnisSinclair type many body potentials: SuttonChen and improved SuttonChen models
(Brock University, 20140606)Volume(density)independent pairpotentials cannot describe metallic cohesion adequately as the presence of the free electron gas renders the total energy strongly dependent on the electron density. The embedded atom method ... 
Phonon spectra and thermal properties of some fcc metals using embeddedatom potentials /
(Brock University, 20050615)By employing the embeddedatom potentials of Mei et ai.[l], we have calculated the dynamical matrices and phonon dispersion curves for six fee metals (Cu,Ag,Au,Ni,Pd and Pt). We have also investigated, within the ... 
Phonon spectra and thermodynamic properties of rare gas solids based on empirical and semiempirical (ab initio) twobody potentials : a comparative study /
(Brock University, 20070601)We study the phonon dispersion, cohesive and thermal properties of raxe gas solids Ne, Ar, Kr, and Xe, using a variety of potentials obtained from different approaches; such as, fitting to crystal properties, purely ab ... 
Planar Topological Defects in Unconventional Superconductors
(Brock University, 20130912)In this work, we consider the properties of planar topological defects in unconventional superconductors. Specifically, we calculate microscopically the interaction energy of domain walls separating degenerate ground ... 
Preparation of SrMgxRu1xO3 thin films by pulsed laser deposition /
(Brock University, 20040714)SrMg^RuiiOa thin films were made by using pulsed laser deposition on SrTiOa (100) substrates in either O2 or Ar atmosphere. The thin films were characterized by xray diffraction, energy dispersive xray microanalysis, dc ... 
Pressure dependence of spin fluctuations in metallic glasses Zrâ â Niâ â ,Zrâ â (Nix/Feâ â â x)â â and /Zrx/feâ â â x
(Brock University, 19910709)The superconducting transition temperature Tc of metallic glasses ZrxFelOOx (x=80, 75), Zr75(NixFelOOx)25 (x=75, 50, 25), and CU2SZr75 were measured under quasihydrostatic pressure up to 8 OPa (80kbar). The volume ... 
Pressure dependence of superconducting properties of MgB2 /
(Brock University, 20030714)We prepared samples of MgB2 and ran sets of experiments aimed for investigation of superconducting properties under pressure. We found the value of pressure derivative of the transition temperature 1.2 ± 0.05 K/GPa. ... 
Pressure dependence of superconductivity in amorphous Ni x Zr 100x alloys
(Brock University, 19881002)Pressure variations of the superconducting transition temperature Ic of a series of amorphous NixZr 1 OOx alloys have been studied under quasmydrostatic pressures upto 8 G Pa. For amorphous samples having Niconcentration ... 
Properties of NaxCoO2 /
(Brock University, 20050629)Polycrysttdline samples of NaiCoOa were prepared using the "Rapid heatup" method. One set of samples was annealed in flowing O2, while the other set in flowing Argon. XRay diffraction measurements indicated a stable ... 
Pulsed laser deposition of YBa2Cu3O7[delta]/PrBa2Cu3O7[delta] /
(Brock University, 19980521)The process of depositing thin films by the use of pulsed laser deposition (PLD) has become a more widely used technique for the growth of substances in a thin film form. Pulsed laser deposition allows for the stoichiometric ...