Internal friction study and theoretical analysis of superconductivity mechanisms of high Tc ceramic superconductors


Grant Data
Project Title
Internal friction study and theoretical analysis of superconductivity mechanisms of high Tc ceramic superconductors
Principal Investigator
Professor Fung, Peter Chin Wan   (Principal investigator)
Co-Investigator(s)
Professor Zhang   (Co-Investigator)
Mr Liang   (Co-Investigator)
Duration
48
Start Date
1993-01-01
Completion Date
1996-12-31
Amount
236000
Conference Title
Presentation Title
Sponsor
RGC General Research Fund (GRF)
HKU Project Code
HKU 299/92E
Grant Type
General Research Fund (GRF)
Funding Year
1992/1993
Status
Completed
Objectives
To measure the crucial characteristics of migration of oxygen atoms to vacant sites in crystals of various superconductors with oxygen deficiency; to calculate the electrical resistance and coherent length of the Cooper pairs of the superconductor-semiconductor composite in a unit cell of a sample subject to a magnetic field; to calculate the specific heat-temperature relation of superconductors as resulting from several plausible theories and test these results with experimental data. In particular, the 'two carrier model' relies on the existence of defects or (oxygen) deficiency and the result is relevant in testing the theory.