Department Of Physics

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https://ir.unilag.edu.ng/handle/123456789/3391
The Department provides tutorial and/or research courses at undergraduate and postgraduate levels leading to the award of the degrees of Bachelor of Sciences (Honours) (B.Sc.), the Master of Science (M.Sc.), Master of Philosophy (M.Phil.) and Doctor of Philosophy (Ph.D.) in Physics respectively. Physics is one of the basic experimental physical sciences.

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Browsing Department Of Physics by Author "Adebayo, G.A"

Now showing 1 - 3 of 3
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    Open Access
    Ab-initio investigation of the electronic, lattice dynamic and thermodynamic properties of ScCd intermetallic alloy
    (World Scientific, 2016) Adetunji, B.I; Olayinka, A.S; Fashae, J.B; Ozebo, V.C.; Adebayo, G.A
    The electronic structures, lattice dynamics and thermodynamic properties of rare-earth intermetallic ScCd alloy are studied by the first-principles plane-wave pseudopotential method within the generalized gradient approximation in the framework of density func tional pertubation theory. The band structure, density of states, phonon dispersion frequencies, vibrational free energy Fvib, specific heat capacity CV and entropy are studied between 0 K and 1500 K. Finally, using the calculated phonon density of states, the thermodynamic properties are determined within the quasi-harmonic approximation and a value of 47.9 (J/mol · K) at 300 K for specific heat capacity of ScCd is predicted
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    Open Access
    Analysis and Interpretation of the Ibuji Spring Magnetic Anomaly Using the Mellin Transform
    (Springer, 2013) Ozebo, V.C.; Ogunsanwo, F.O; Adebayo, G.A; Adeniran, O.J
    The Mellin transform is a mathematical tool which has been applied in many areas of Mathematics, Physics and Engineering. Its application in Geophysics is in the computation of solution of potential problems for the determination of the mass as well as the depth to the basement of some solid mineral deposits. In this study, the Mellin transform is used to determine the depth to the top (h) and the depth to the bottom (H) of the basement of a profile of an anomalous magnetic body. Ibuji, the study area is located in Ifedore Local Government area of Ondo state, Nigeria, underlain by Precambrian complex rocks and bounded by geographical co-ordinate of Easting 5 ◦0000000 to 5 ◦4 03000 and Northing 7 ◦2400000 to 7 ◦2703600. The magnetic anomaly profile due to a two– dimensional body(vertical thin sheet)over magnetic spring of the study area was digitised and the values of magnetic amplitude (nT) with respect to its horizontal distance (say interval of 5 m) obtained from the digitized profile was then used in the computation of Mellin transform using Matlab programs. In order to determine the depths H and h, the amplitudes were considered at three arbitrary point (s = 1 4 , 1 2 and 3 4 ) such that, (0 < s < 1), where s is a complex variable of real positive integer. The value obtained for H was 47.95 m, which compared favourably with the result obtained using other methods. Meanwhile, the value obtained for h has a convergence restriction, whereby, at lower values of s, there is divergence, while at higher values of s, (about 0.9), the result converges and h was obtained to be 32.56 m. The Ibuji magnetic anomaly was therefore analysed to have a depth to the bottom (H) of 47.95 m and depth to the top of 32.56 m using this mathematical tool
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    Open Access
    Increased Malleability in Tetragonal Zrx Ti1−x O2 Ternary Alloys: First-Principles Approach
    (De-Gruyter, Germany, 2017) Ayedun, F.; Adebambo, P.O; Adetunji, B.I; Ozebo, V.C; Oguntuase, J.A; Adebayo, G.A
    Tetragonal phase of ZrxTi1−xO2 ternary alloys is studied using generalized gradient approximation (GGA) projector augmented wave-based density functional theory (DFT). The calculations are used to characterize alloying effects of Zr substituting Ti in tutile TiO2 .Band gap calcula tions show a direct band gap at x = 0, while at other con centrations, an indirect band gap is observed. Electronic structure analysis shows that Zr alloying is capable of lowering the band gap transition of ZrxTi1−xO2 at x = 1 by the presence of an impurity state of transition metal Zr 5S2 on the upper edge of the valence band. The addition of Zr also results in the corresponding increment in lattice constant with the material becoming more ductile and malleable.