Physics & Astronomy: Recent submissions

Now showing items 221-225 of 659

    • AC losses in superconducting niobium 

      Al-Huseini, Fahad A. (University of St Andrews, 1973) - Thesis
      This thesis is concerned with measurements of alternating field losses in cylindrical rods of niobium in its superconducting state. Six samples have been investigated each with a different surface condition, Magnetization ...

    • Vibrational and electronic properties of impurities in semiconductors 

      Noras, James M. (University of St Andrews, 1978) - Thesis
      Properties of impurities in semiconductors have been investigated by means of absorption spectroscopy. The studies have concentrated not on one topic but on a range of types of impurity behaviour: they may be summarized ...

    • Studies relating to cyclotron emission from semiconductors 

      Cowan, David A. (University of St Andrews, 1985) - Thesis
      In this thesis studies relating to cyclotron emission in GaAs, InSb, InP and CdₓHg₁- ₓTe (C.M.T.) are described. The effect of the electric field bias on the emission intensity and linewidth in GaAs and InP is studied and ...

    • Exciton saturation dynamics and spin gratings in multiple quantum well semiconductors 

      Cameron, Alasdair R. (University of St Andrews, 1997) - Thesis
      The dynamics of exciton saturation in GaAs/AlGaAs multiple quantum wells are investigated using picosecond optical pulses. The main contributions to exciton saturation have been shown to be phase space filling. Coulomb ...

    • A study of the high temperature superconductor YBa₂Cu₃O₇-𝛿 and its cobalt-doped derivative 

      Webster, Wendy J. (University of St Andrews, 1994) - Thesis
      Static nuclear magnetic resonance (NMR) techniques have been used to study the magnetic hyperfine interactions of ⁶³Cu and ⁸⁹Y nuclei in the superconducting (T=1.5K) and normal (T=160-300K) states of the pure and cobalt ...