| EPSRC Reference: |
GR/R57409/01 |
| Title: |
Critical Current Anisotropy and Flux Vortex Structure in high Jc YBaCuO Epitaxial thin films and bi-crystals. |
| Principal Investigator: |
Blamire, Professor M |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
Materials Science & Metallurgy |
| Organisation: |
University of Cambridge |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
25 December 2001 |
Ends: |
24 December 2004 |
Value (£): |
163,921
|
| EPSRC Research Topic Classifications: |
| Materials Characterisation |
|
|
| EPSRC Industrial Sector Classifications: |
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
Although there is by now extensive understanding of the vortex-matter phase diagram for YBa2Cu3O7-a the angular dependence of the vortex structure in materials with strong pinning is still relatively poorly understood. This project will address the basic issues that relate to the superconducting critical current in YBa2Cu3O7-a epitaxial films and bicrystals with low angle grain boundaries. The programme will build on extensive expertise in the precision angular characterisation of the critical current density as a function of field and temperature. The contribution of different physical and geometrical factors (eg the flux vortex substructure, intrinsic pinning, material anisotropy and the Lorentz force) will be separated by making detailed angular measurements on epitaxial films deposited on vicinal cut substrates. A study of vortex channelling will enable current theories for the characteristic states of the vortex lattice in different angular regimes to be confirmed quantitatively. Measurements of flux flow in bicrystal grain boundaries and lithographically prepared meso-scale channels will be made in order to extract fundamental microscopic parameters for the quantitative analysis of flux dissipation in YBa2Cu3O7-a and provide the enabling technology to underpin applications of technological coated conductor material. Finally an attempt will be made to resolve the ambiguities in a critical current defined through a 'critical current criterion' when flux creep is significant.
|
|
Key Findings |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Potential use in non-academic contexts |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Impacts |
|
| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
|
| Date Materialised |
|
|
|
|
Sectors submitted by the Researcher |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
| Project URL: |
|
| Further Information: |
|
| Organisation Website: |
http://www.cam.ac.uk |