Browsing M.Sc. Physics by Title
Now showing items 4463 of 91

KrAr laser Raman spectrometer for low temperature measurements /
(Brock University, 20040629)A Czerny Mount double monochromator is used to measure Raman scattered radiation near 90" from a crystalline, Silicon sample. Incident light is provided by a mixed gas KrAr laser, operating at 5145 A. The double ... 
La1xSrxMnO3 as a candidate for a room temperature pressure sensor /
(Brock University, 20030521)Perovskite manganite compounds, LaixDxMnOs (Ddivalent alkaline earth Ca, Sr or Ba), whose electrical and magnetic properties were first investigated nearly a half century ago, have attracted a great deal of attention ... 
Low frequency Raman scattering in amorphous materials: fused quartz, "pyrex" borosilicate glass and sodalime silicate glass
(Brock University, 19910709)Raman scattering in the region 20 to 100 cm 1 for fused quartz, "pyrex" borosilicate glass, and soft sodalime silicate glass was investigated. The Raman spectra for the fused quartz and the pyrex glass were obtained ... 
Magnetic and high pressure studies in the YPd5B3C3 system
(Brock University, 19950709)The macroscopic properties of the superconducting phase in the multiphase compound YPd5B3 C.3 have been investigated. The onset of superconductivity was observed at 22.6 K, zero resistance at 21.2 K, the lower critical ... 
Magnetic and transport properties of (Ba1xKx)Fe2As2
(Brock University, 20090128)Single crystals of (Bal  xKx)Fe2As2 were prepared using the Sn flux method. Two heating methods were used to prepare the single crystals: the slow heating and rapid heating methods. It was found that the single crystals ... 
Magnetic properties of the Biâ Srâ CaCuâ Oâ single crystal
(Brock University, 19910709)The Bi2Sr2CaCu20g single crystal with a superconducting transition temperature equal to 90 ± 2 K was prepared. The irreversibility line of the single crystal for a mgnetic field direction along the caxis and T* in the ... 
The measured variation of the DebyeWaller factor of aluminum from 295K to 815K by using the energy dispersive xray diffraction technique
(Brock University, 19920709)The Energy Dispersive Xray Diffraction System at Brock University has been used to measure the intensities of the diffraction lines of aluminum powder sample as a function of temperature. At first, intensity measurements ... 
Molecular dynamics calculation of mean square displacement in alkali metals and rare gas solids and comparison with lattice dynamics
(Brock University, 19840709)Molec ul ar dynamics calculations of the mean sq ua re displacement have been carried out for the alkali metals Na, K and Cs and for an fcc nearest neighbour LennardJones model applicable to rare gas solids. The ... 
Monte Carlo study of the XYmodel on quasiperiodic lattices
(Brock University, 19960709)Monte Carlo Simulations were carried out using a nearest neighbour ferromagnetic XYmodel, on both 2D and 3D quasiperiodic lattices. In the case of 2D, both the unfrustrated and frustrated XVmodel were studied. For ... 
NMR characterization of chlorhexidine in lipidbased formulations /
(Brock University, 20040714)A mixture of Chlorhexidine digluconate (CHG) with glycerophospholipid 1,2dimyristoyl <^54glycero3phospocholine (DMPCrf54) was analysed using ^H nuclear magnetic resonance. To analyze powder spectra, the dePakeing ... 
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, ...