Objective
Granular bismuth 2 strontium 2 calcium copper 2 oxygen 8 (BSCCO) films were prepared by laser ablation and postannealing followed by deoxygenation to vary the grain boundary properties. A detailed study was made of the fast nonlinear photoresponse of these films with emphasis on modelling and magnetic effects. Measurements of the sensitivity as a function of temperature, bias current and intensity reveal the signal source to be nonbolometric. The response is found to obey a square root law. It is believed that the detection mechanism arises from the interaction of rain boundary Josephoon junctions with radiation induced screening currents.
Spray pyrolysis was investigated as a method of production of superconducting films of the BSCCO family. The process variables which govern deposition were identified and the properties of the sprayed films were determined.
The optical properties of high temperature superconductors (HTS) in thin film form under high power for infrared (FIR) radiation has been investigated. Several kinds of infrared response were observed based on different physical mechanisms. High critical temperature films showed a resistance response in a current biased mode like photoconductors. Photovoltaic signals were detected in both the superconducting and the normal conducting phase of thin films of yttrium barium2 copper 3 oxygen (7-x).
Below the critical temperature a voltage signal is generated if the sample is subjected to a small magnetic field parallel to the plane of the film. This effect has been attributed to an infrared induced Nernst effect in thallium 2 barium 2 calcium copper 2 oxygen 8 films.
Above the critical temperature strong voltage signals occur in ab oriented films which have a slight misalingment in crystallographic orientation which generates a kind of atomic layer thermocouple yielding a very large effect.
High temperature superconductors have an energy gap which can be observed in the far infrared. We intend to deposit and characterise superconducting oxides on a FIR transparent substrate, and perform linear and nonlinear spectroscopy. Such techniques will allow to elucidate the processes involved in HTC superconductors and open the area of ultrahigh frequency parallel devices analogous to optical computers
Fields of science (EuroSciVoc)
- natural sciences chemical sciences inorganic chemistry transition metals
- natural sciences chemical sciences inorganic chemistry alkaline earth metals
- natural sciences chemical sciences inorganic chemistry post-transition metals
- natural sciences physical sciences optics nonlinear optics
- natural sciences physical sciences electromagnetism and electronics superconductivity
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Data not available
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
2 DUBLIN
Ireland
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.