| EPSRC Reference: |
EP/C512634/1 |
| Title: |
Permanent Magnet Films: Visiting Fellowship For Professor Shaolong Tang |
| Principal Investigator: |
Gibbs, Professor M |
| Other Investigators: |
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| Department: |
Physics and Astronomy |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 May 2005 |
Ends: |
28 February 2006 |
Value (£): |
19,575
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
Materials Processing |
| Materials Synthesis & Growth |
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| Panel History: |
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Summary on Grant Application Form |
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The improvement in the performance of RE-Fe-B magnets (RE = Rare Earth) based on the tetragonal phase of the type RE:Fe:B, (2:14:1) and the control of their structural and compositional properties at a nanoscopic level, initiated for melt spun alloy ribbons, has indicated a number of possibilities for microelectromechanical systems (MEMS). In order to understand fundamental interactions, and to synthesize RE-Fe-B magnetic films suitable for technological applications, it is necessary to investigate the effects of the growth conditions on the film properties. In order to use RE-Fe-B thin films for technological applications such as for example, MEMS, it is necessary to obtain films with thicknesses typically - 10 - 50pm. In order to exploit, in a very controlled fashion, the benefits of variation of the RE:Fe ratio (remanence enhancement and exchange spring behavior) we need to use controlled co-sputtering to generate films with properties optimized for particular applications. In producing thick (>1 pm) films, there are two issues to be addressed. Firstly, can the optimum microstructure (high PMA and crystal texture) be maintained as the film thickness increases? Secondly, how can problems associated with film stress and consequent film delamination be addressed? We need to carefully characterize the evolution of texture with film thickness using magnetic, x-ray and electron microscopical analysis. Can the build up of defects be controlled in such a way as to maintain the highly textured growth. Our deposition facilities allow for the testing of the effects of composition, substrate temperature, Ar partial pressure and substrate rotation rate. This route will be pushed as far as possible in terms of optimum film performance
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.shef.ac.uk |