Superconductive Effects in Thin Cluster Films
Degree GrantorUniversity of Canterbury
Degree NameMaster of Science
In this thesis, the superconductive and superresistive properties of thin percolating films of lead nanoclusters are presented. The samples were created by depositing clusters from an inert gas aggregation cluster source onto substrates held at either room temperature or 10K.
Observations of the characteristic behaviours of the samples were made through R(T ) and V (I) measurements. Several interesting features were observed - smooth and discrete steps in the R(I) curves, hysteresis between increasing and decreasing bias currents, and non-zero resistances at superconducting temperatures. Explanations are proposed in terms of theoretical models of several phenomena - phase slips, phase slip centres and hotspots - which have seen little prior application to percolating systems in literature.
Showing items related by title, author, creator and subject.
Phipps, W.; Harrison, M.J.; Duke, R.M. (University of Canterbury. Electrical and Computer Engineering., 2006)This paper describes the development of a new generation of power converter, used to power telecommunications equipment. A telecommunications converter must comply with the psophometric noise standard CCIF-1951 and the ...
Phipps, W.S.; Duke, R.M.; Harrison, M.J. (University of Canterbury. Electrical and Computer Engineering., 2006)This paper describes the development of a novel three-phase phase-locked loop (PLL) used to compensate for mains variations by being incorporated as part of a feedforward loop in a three-phase telecommunications power ...
Maw, R.L.; Taylor, D.P. (University of Canterbury. Electrical and Computer Engineering, 2005)A space-time (ST) trellis encoded scheme with Mary continuous phase frequency shift keying with a modulationindex of 1M (M-CPFSK) is presented. A ST-M-CPFSK system model that incorporates the Rimoldi decomposition of CPFSK ...