| EPSRC Reference: |
GR/M81786/01 |
| Title: |
HETERO INTERFACE STRUCTURE DETERMINATION BY SIMULTANEOUS ENERGY MINIMISATION AND QUANTITATIVE HREM |
| Principal Investigator: |
Moebus, Dr G |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
Materials |
| Organisation: |
University of Oxford |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 September 1999 |
Ends: |
31 August 2002 |
Value (£): |
42,489
|
| EPSRC Research Topic Classifications: |
| Materials Characterisation |
Surfaces & Interfaces |
|
| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
Chemicals |
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
High resolution electron microscopy will be performed on characteristic and representative interface structures between non-magnetic metallic thin films. Samples will be grown by molecular beam epitaxy. Structure determination with sub-Angstroem precision will be quantified and applied to dislocation cores. Cu-Al and Nb-V interfaces will be examined first, subsequently composition tuning of Cu-Cu(Al) and Nb-Nb(V) is envisaged to result in interfaces of variable misfit (transition from interface dislocations to bulk-like dislocations). The study comprises distribution, localisation, coherency-type and core-type of interfaces and their dislocations.Computer-controlled structure retrieval routines will be written to refine (optimise) structure models according to two figure-of-merits in parallel: (i) the energy of the structure model and (ii) the R-factor defined by the agreement of simulated to experimental electron microscopy image. The combined information is expected to result in mutual stabilisation of the dislocation-core refinement process. This part is first applied to Cu-A1. An improved exploration of the configuration space with respect to multiple local optima ( metastable structures ) and a check of the applicability regime of various interatomic potential functions are expected as a by-product.
|
|
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.ox.ac.uk |