Browsing M.Sc. Physics by Title
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Quantum Monte Carlo study of electrostatic polarizabilities of H and He atoms /
(Brock University, 20010714)The infinitesimal differential quantum Monte Carlo (QMC) technique is used to estimate electrostatic polarizabilities of the H and He atoms up to the sixth order in the electric field perturbation. All 542 different QMC ... 
Rotationelectronic interaction in the 3pcomplex Rydberg state of water
(Brock University, 19790709)An energy theory is formulated for the rotational energy levels in a pcomplex Rydberg state of an asymmetric top molecule of symmetry C2v. The effective Hamiltonian used consists of the usual rigid rotor Hamiltonian ... 
Setup and evaluation of a midinfrared reflectometer and investigation of the optical properties of doped tin telluride
(Brock University, 19980709)A system comprised of a Bomem interferometer and a LT3110 HeliTran cryostat was set up to measure the reflectance of materials in the midinfrared spectral region. Several tests were conducted to ensure the consistency ... 
Simultaneous extraction of order parameters and orientational distribution fuctions from 31[superscript]P NMR spectra of magnetically partially oriented phospholipid bilayers
(Brock University, 19960709)Order parameter profiles extracted from the NMR spectra of model membranes are a valuable source of information about their structure and molecular motions. To al1alyze powder spectra the dePakeing (numerical deconvolution) ... 
Specific heat of UPdâ Siâ
(Brock University, 19940709)The specific heat of singlecrystal U Pd2 Si2 has been studied using both the step heating and continious heating methods for the temperature range 2 to 250 K. Successive phase transitions at Tl = 136I< and T2 = 108I< ... 
Study of colossal magnetoresistance and pressure effects in La2/3Ca1/3MnO2 thin films /
(Brock University, 19980521)The main purpose of this thesis is to study properties of La2/3Cai/3Mn03, both polycrystalline ceramics and thin films. This material has striking related electrical and magnetic properties. Thin films show colossal ... 
Study of heat capacity measurement methods for small samples
(Brock University, 19900709)Methods of measuring specific heats of small samples were studied. Three automated methods were explored, two of which have shown promising results. The adiabatic continuous heating method, has provided smooth well ... 
Study on the properties of piezoelectric materials and manganesebased oxide perovskites /
(Brock University, 20050629)Perovskite type piezoelectric and manganese oxide materials have gained a lot of attention in the field of device engineering. Lead zirconium titananium oxide (PbZri.iTiiOa or PZT) is a piezoelectric material widely used ... 
Surface effect ferromagnetism in pure and reduced strontium titanate
(Brock University, 20110308)A room temperature ferromagnetic hysteresis is observed in single crystal strontium titanate substrates as purchased from several manufacturers. It was found that polishing all sides of the substrates removed this ... 
Systematic studies of the effect of pressure on magnetic and electronic properties of La2/3Ca1/3MnO3 thin films with various thicknesses /
(Brock University, 19990521)Interest in mixedvalent perovskite manganese oxides of La\xAxMnO^ (v4divalent alkaline earth Ca, Sr or Ba), whose unusual properties were discovered nearly a half century ago, has recently been revived. The discovery ... 
Thermodynamic properties and DebyeWaller factor of fee materials
(Brock University, 19910709)We have calculated the equation of state and the various thermodynamic properties of monatomic fcc crystals by minimizing the Helmholtz free energy derived in the high temperature limit for the quasiharmonic theory, QH, ... 
Transmission measurements using a new farinfrared setup
(Brock University, 19960709)A system comprised of a MartinPuplett type polarizing interferometer and a Helium3 cryostat was developed to study the transmission of materials in the veryfarinfrared region of the spectrum. This region is of ... 
A treatment of atomic mean square displacement in higher order perturbation theory
(Brock University, 19900709)A general derivation of the anharmonic coefficients for a periodic lattice invoking the special case of the central force interaction is presented. All of the contributions to mean square displacement (MSD) to order 14 ... 
Ultrasonic attenuation in layered superconductors /
(Brock University, 20060604)We study the ultrasonic attenuation in layered superconductors using the Green's function formalism. General expressions are derived analytically and then calculated numerically by taking the nearest and nextnearest ... 
Variational Monte Carlo estimation of the dissociation energy of CuH using correlated sampling
(Brock University, 19940709)A new approach to treating large Z systems by quantum Monte Carlo has been developed. It naturally leads to notion of the 'valence energy'. Possibilities of the new approach has been explored by optimizing the wave ... 
Xray diffraction from Al powder using energy dispersive technique
(Brock University, 19910709)Using the energy dispersive x ...ray diffraction (EDXD) technique, the room temperature diffraction pattern of Al powder was obtained at diffraction angles ~ 30° and 50°. From the small angle diffraction pattern the ... 
Xray diffraction of a gramnegative bacterial membrane mimetic
(Brock University, 20090128)This thesis applies xray diffraction to measure he membrane structure of lipopolysaccharides and to develop a better model of a LPS bacterial melilbrane that can be used for biophysical research on antibiotics that ...